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4x+9(x-2)=-57
We move all terms to the left:
4x+9(x-2)-(-57)=0
We add all the numbers together, and all the variables
4x+9(x-2)+57=0
We multiply parentheses
4x+9x-18+57=0
We add all the numbers together, and all the variables
13x+39=0
We move all terms containing x to the left, all other terms to the right
13x=-39
x=-39/13
x=-3
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