x+(x-15)=90

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



x+(x-15)=90

We move all terms to the left:

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

We get rid of parentheses

x+x-15-90=0

We add all the numbers together, and all the variables

2x-105=0

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

2x=105

x=105/2

x=52+1/2

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