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-70=-2-4b
We move all terms to the left:
-70-(-2-4b)=0
We add all the numbers together, and all the variables
-(-4b-2)-70=0
We get rid of parentheses
4b+2-70=0
We add all the numbers together, and all the variables
4b-68=0
We move all terms containing b to the left, all other terms to the right
4b=68
b=68/4
b=17
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