(x+3)+(2x+-3)=90

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Solution for (x+3)+(2x+-3)=90 equation: 



(x+3)+(2x+-3)=90

We move all terms to the left:

(x+3)+(2x+-3)-(90)=0

We add all the numbers together, and all the variables

(x+3)+(2x-3)-90=0

We get rid of parentheses

x+2x+3-3-90=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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