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7(2a-3)-50=-3
We move all terms to the left:
7(2a-3)-50-(-3)=0
We add all the numbers together, and all the variables
7(2a-3)-47=0
We multiply parentheses
14a-21-47=0
We add all the numbers together, and all the variables
14a-68=0
We move all terms containing a to the left, all other terms to the right
14a=68
a=68/14
a=4+6/7
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