6x+9=90-3X-9

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Solution for 6x+9=90-3X-9 equation: 



6x+9=90-3x-9

We move all terms to the left:

6x+9-(90-3x-9)=0

We add all the numbers together, and all the variables

6x-(-3x+81)+9=0

We get rid of parentheses

6x+3x-81+9=0

We add all the numbers together, and all the variables

9x-72=0

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

9x=72

x=72/9

x=8

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