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-2(4-x)=9
We move all terms to the left:
-2(4-x)-(9)=0
We add all the numbers together, and all the variables
-2(-1x+4)-9=0
We multiply parentheses
2x-8-9=0
We add all the numbers together, and all the variables
2x-17=0
We move all terms containing x to the left, all other terms to the right
2x=17
x=17/2
x=8+1/2
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