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15+2b=23*
We move all terms to the left:
15+2b-(23*)=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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