15x+90=20x-40

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Solution for 15x+90=20x-40 equation: 



15x+90=20x-40

We move all terms to the left:

15x+90-(20x-40)=0

We get rid of parentheses

15x-20x+40+90=0

We add all the numbers together, and all the variables

-5x+130=0

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

-5x=-130

x=-130/-5

x=+26

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