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-7(2a-3)=-18
We move all terms to the left:
-7(2a-3)-(-18)=0
We add all the numbers together, and all the variables
-7(2a-3)+18=0
We multiply parentheses
-14a+21+18=0
We add all the numbers together, and all the variables
-14a+39=0
We move all terms containing a to the left, all other terms to the right
-14a=-39
a=-39/-14
a=2+11/14
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