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6(5-x)=84
We move all terms to the left:
6(5-x)-(84)=0
We add all the numbers together, and all the variables
6(-1x+5)-84=0
We multiply parentheses
-6x+30-84=0
We add all the numbers together, and all the variables
-6x-54=0
We move all terms containing x to the left, all other terms to the right
-6x=54
x=54/-6
x=-9
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