3+7x+90=135

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Solution for 3+7x+90=135 equation: 



3+7x+90=135

We move all terms to the left:

3+7x+90-(135)=0

We add all the numbers together, and all the variables

7x-42=0

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

7x=42

x=42/7

x=6

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