20x-40=15x+15

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



20x-40=15x+15

We move all terms to the left:

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

We get rid of parentheses

20x-15x-15-40=0

We add all the numbers together, and all the variables

5x-55=0

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

5x=55

x=55/5

x=11

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