15x-40=-5x

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Solution for 15x-40=-5x equation: 



15x-40=-5x

We move all terms to the left:

15x-40-(-5x)=0

We get rid of parentheses

15x+5x-40=0

We add all the numbers together, and all the variables

20x-40=0

We move all terms containing x to the left, all other terms to the right

20x=40

x=40/20

x=2

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