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15-2b=-
We move all terms to the left:
15-2b-(-)=0
We add all the numbers together, and all the variables
-2b+15-0=0
We add all the numbers together, and all the variables
-2b+15=0
We move all terms containing b to the left, all other terms to the right
-2b=-15
b=-15/-2
b=7+1/2
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