5x-12+3x+6=90-x

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Solution for 5x-12+3x+6=90-x equation: 



5x-12+3x+6=90-x

We move all terms to the left:

5x-12+3x+6-(90-x)=0

We add all the numbers together, and all the variables

5x+3x-(-1x+90)-12+6=0

We add all the numbers together, and all the variables

8x-(-1x+90)-6=0

We get rid of parentheses

8x+1x-90-6=0

We add all the numbers together, and all the variables

9x-96=0

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

9x=96

x=96/9

x=10+2/3

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