x+15+x+20=15

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



x+15+x+20=15

We move all terms to the left:

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

We add all the numbers together, and all the variables

2x+20=0

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

2x=-20

x=-20/2

x=-10

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