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-4(3-x)-9(5-9x)=0
We add all the numbers together, and all the variables
-4(-1x+3)-9(-9x+5)=0
We multiply parentheses
4x+81x-12-45=0
We add all the numbers together, and all the variables
85x-57=0
We move all terms containing x to the left, all other terms to the right
85x=57
x=57/85
x=57/85
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