100=10x+8-30x+12

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Solution for 100=10x+8-30x+12 equation: 



100=10x+8-30x+12

We move all terms to the left:

100-(10x+8-30x+12)=0

We add all the numbers together, and all the variables

-(-20x+20)+100=0

We get rid of parentheses

20x-20+100=0

We add all the numbers together, and all the variables

20x+80=0

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

20x=-80

x=-80/20

x=-4

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