(x-15)+(x+3)=90

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Solution for (x-15)+(x+3)=90 equation: 



(x-15)+(x+3)=90

We move all terms to the left:

(x-15)+(x+3)-(90)=0

We get rid of parentheses

x+x-15+3-90=0

We add all the numbers together, and all the variables

2x-102=0

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

2x=102

x=102/2

x=51

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