(3x+6)+(3x+18)=90

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Solution for (3x+6)+(3x+18)=90 equation: 



(3x+6)+(3x+18)=90

We move all terms to the left:

(3x+6)+(3x+18)-(90)=0

We get rid of parentheses

3x+3x+6+18-90=0

We add all the numbers together, and all the variables

6x-66=0

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

6x=66

x=66/6

x=11

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