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6x+7(1-x)=13.5
We move all terms to the left:
6x+7(1-x)-(13.5)=0
We add all the numbers together, and all the variables
6x+7(-1x+1)-(13.5)=0
We add all the numbers together, and all the variables
6x+7(-1x+1)-13.5=0
We multiply parentheses
6x-7x+7-13.5=0
We add all the numbers together, and all the variables
-1x-6.5=0
We move all terms containing x to the left, all other terms to the right
-x=6.5
x=6.5/-1
x=-6+0.5/1
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