I KNEW IT WAS COMING
The day that I could not help Katie with her math homework. She thinks I should put it on the blog so here goes. The equation is 3x = 15. Use it for the problems below.
1. solve the equation ( easy, 5)
2. multiply both sides by 10. Solve the new equation. ((3x X10 = (15x10) 30x=150, x =5).
3. Add 5 to both sides. Substitute the solution to the original equation in the new equation.
WHAT does that mean. Substitute it where??? (3x +5 = 15+5. 3x5+5=15+5, x=5.)
4. Subtract 2 from both sides. (3x-2=15-2. 13=13) Substitute the solution to the original equation in the new equation. Substitute it WHERE??? Then explain it to Katie
Anyway, it goes on from there. And we are only in 5th grade. Yikes!
Just keeping you abreast of how much fun we are having - I will NEVER make it through high school. I think I am going to be a dropout. Hope all is well with each and everyone of you.
And Amy, how is that grandbaby doing? Are you feeling well? Are you showing yet?
Love to all
1. solve the equation ( easy, 5)
2. multiply both sides by 10. Solve the new equation. ((3x X10 = (15x10) 30x=150, x =5).
3. Add 5 to both sides. Substitute the solution to the original equation in the new equation.
WHAT does that mean. Substitute it where??? (3x +5 = 15+5. 3x5+5=15+5, x=5.)
4. Subtract 2 from both sides. (3x-2=15-2. 13=13) Substitute the solution to the original equation in the new equation. Substitute it WHERE??? Then explain it to Katie
Anyway, it goes on from there. And we are only in 5th grade. Yikes!
Just keeping you abreast of how much fun we are having - I will NEVER make it through high school. I think I am going to be a dropout. Hope all is well with each and everyone of you.
And Amy, how is that grandbaby doing? Are you feeling well? Are you showing yet?
Love to all
posted by Mom Oyler @ 8:03 PM
8 Comments:
At 12:33 AM ,
Dwayne said...
#1
3x = 15
x=15/3
x=5
#2
(10)3x = (10)15
#3
(10)3x + 5 = (10)15 + 5
now place the original solution (which was 5)in place of the x.
(10)3(5) + 5 = (10)15 + 5
155=155
#4
(10)3x + 5 - 2 = (10)15 + 5 - 2
30x + 3 = 150 + 3
30x = 150
now place the original solution (which was 5)in place of the x.
30 (5) = 150
150 = 150
At 12:38 AM ,
Dwayne said...
It seems to us (and Jenny is really the brains of this operation), that deciphering the wording of the problem is what is difficult.
In the two "substitution" questions, neither would really require putting the 5 in ...you could just solve the problem. It looks as though the lesson of the problem is in demonstrating that as long as you do the same thing to both sides (whether it is multiplying both sides by 10's, adding 5's, or subtracting 2's, the answer will always be the same.
At 1:22 PM ,
Mrs. G said...
uh.....
3x= pants
i'm pretty sure about that. in fact, i'm 60% sure that that answer is 100% correct.
At 7:21 PM ,
Mom Oyler said...
Thanks guys. I think I was trying to make it harder than it was, But you are right, the way the worded it threw me,I had the problem solved but didn't realize it. The teacher this am said other parents were puzzled by it's wording.. Thanks Jenny, now that I know you are the brains - maybe we will make it through algebra and geometry.
At 7:23 PM ,
Mom Oyler said...
Thanks Lins, I knew you would come through for me!. Did you remember you are suppost to fax me something?
At 7:53 PM ,
Mrs. G said...
mom...no problem. anytime. i have to warn you though, i'm not really that good at algebra. my forte is more quantam physics and trigonometry.
yeah i forgot. i'll fax you tomorrow morning. what is the fax number at dr. conrad's office.
At 8:15 AM ,
Mom Oyler said...
look forward to the help with trig!
Can't fax tomorrow, won't be in office, will have to do it Mon.
At 1:52 PM ,
Mrs. G said...
Mom,
I don't work on Monday...(THANK YOU MLK JR.!)....so it will have to be Tuesday. Sorry. I paid the $200 by the way. I'm getting ready to e-mail you.
Lins
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