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-34=b+42-5b
We simplify the equation to the form, which is simple to understand
-34=b+42-5b
We move all terms containing b to the left and all other terms to the right.
-1b+5b=+42+34
We simplify left and right side of the equation.
+4b=+76
We divide both sides of the equation by 4 to get b.
b=19
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