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0.5x-1.2=-7.7
We move all terms to the left:
0.5x-1.2-(-7.7)=0
We add all the numbers together, and all the variables
0.5x+6.5=0
We move all terms containing x to the left, all other terms to the right
0.5x=-6.5
x=-6.5/0.5
x=-13
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