12.5x+30=-7.5x+90.5.

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Solution for 12.5x+30=-7.5x+90.5. equation: 



12.5x+30=-7.5x+90.5.

We move all terms to the left:

12.5x+30-(-7.5x+90.5.)=0

We add all the numbers together, and all the variables

12.5x-(-7.5x)+30=0

We get rid of parentheses

12.5x+7.5x+30=0

We add all the numbers together, and all the variables

20x+30=0

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

20x=-30

x=-30/20

x=-1+1/2

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