2x+(x+15)=105

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Solution for 2x+(x+15)=105 equation: 



2x+(x+15)=105

We move all terms to the left:

2x+(x+15)-(105)=0

We get rid of parentheses

2x+x+15-105=0

We add all the numbers together, and all the variables

3x-90=0

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

3x=90

x=90/3

x=30

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