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19.5=7x-12
We move all terms to the left:
19.5-(7x-12)=0
We get rid of parentheses
-7x+12+19.5=0
We add all the numbers together, and all the variables
-7x+31.5=0
We move all terms containing x to the left, all other terms to the right
-7x=-31.5
x=-31.5/-7
x=4+2.3333333333333/4.6666666666667
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