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x-4(x+2)=-15.5
We move all terms to the left:
x-4(x+2)-(-15.5)=0
We add all the numbers together, and all the variables
x-4(x+2)+15.5=0
We multiply parentheses
x-4x-8+15.5=0
We add all the numbers together, and all the variables
-3x+7.5=0
We move all terms containing x to the left, all other terms to the right
-3x=-7.5
x=-7.5/-3
x=2+1/2
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