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12x-9(4-6x)=-638.58
We move all terms to the left:
12x-9(4-6x)-(-638.58)=0
We add all the numbers together, and all the variables
12x-9(-6x+4)-(-638.58)=0
We add all the numbers together, and all the variables
12x-9(-6x+4)+638.58=0
We multiply parentheses
12x+54x-36+638.58=0
We add all the numbers together, and all the variables
66x+602.58=0
We move all terms containing x to the left, all other terms to the right
66x=-602.58
x=-602.58/66
x=-9+3.3255813953488/25.581395348837
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