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7.5=3x+3.6
We move all terms to the left:
7.5-(3x+3.6)=0
We get rid of parentheses
-3x-3.6+7.5=0
We add all the numbers together, and all the variables
-3x+3.9=0
We move all terms containing x to the left, all other terms to the right
-3x=-3.9
x=-3.9/-3
x=1+0.9/3
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