x+(15+2x)=90

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Solution for x+(15+2x)=90 equation: 



x+(15+2x)=90

We move all terms to the left:

x+(15+2x)-(90)=0

We add all the numbers together, and all the variables

x+(2x+15)-90=0

We get rid of parentheses

x+2x+15-90=0

We add all the numbers together, and all the variables

3x-75=0

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

3x=75

x=75/3

x=25

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