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-51.69=7.2+3.9x
We move all terms to the left:
-51.69-(7.2+3.9x)=0
We add all the numbers together, and all the variables
-(3.9x+7.2)-51.69=0
We get rid of parentheses
-3.9x-7.2-51.69=0
We add all the numbers together, and all the variables
-3.9x-58.89=0
We move all terms containing x to the left, all other terms to the right
-3.9x=58.89
x=58.89/-3.9
x=-15+0.39/3.9
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