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4x=-30-8x
We move all terms to the left:
4x-(-30-8x)=0
We add all the numbers together, and all the variables
4x-(-8x-30)=0
We get rid of parentheses
4x+8x+30=0
We add all the numbers together, and all the variables
12x+30=0
We move all terms containing x to the left, all other terms to the right
12x=-30
x=-30/12
x=-2+1/2
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