how u do this stuff?
2006-11-09 11:45:03 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
3x-5(3x-7=2(x+9)+45
First use distributive property:
3x-15x+35=2x+18+45
Now combine like terms:
-12x+35=2x+63
Now combine the x's:
-14x+35=63
Now begin isolating the variable by subtracting 35 from both sides:
-14x=28
Now finish isolating the variable by dividing both sides by -14:
x=-2
2006-11-09 11:56:47 · answer #1 · answered by hiperociti 2 · 2⤊ 0⤋
as said in the first answer:
3x-5(3x-7)=2(x+9)+45
3x-15x+35=2x+18+45
-12x+35=2x+63
-14x=28
x= -2
2006-11-09 19:56:39 · answer #2 · answered by Eve 4 · 0⤊ 0⤋
3x-5(3x-7)=2(x+9)+45
combine like terms
9x-21x-15x-35=2x+18+45
I'm pretty sure thats how you combine them, I'll let you finish.
2006-11-09 20:02:42 · answer #3 · answered by Naylor 2 · 0⤊ 1⤋
distribute
combine like terms
isolate the variable
2006-11-09 19:46:35 · answer #4 · answered by Anonymous · 0⤊ 0⤋