8x+7x=12x+90

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Solution for 8x+7x=12x+90 equation: 



8x+7x=12x+90

We move all terms to the left:

8x+7x-(12x+90)=0

We add all the numbers together, and all the variables

15x-(12x+90)=0

We get rid of parentheses

15x-12x-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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