87=b+39

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Solution for 87=b+39 equation:


Simplifying
87 = b + 39

Reorder the terms:
87 = 39 + b

Solving
87 = 39 + b

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-1b' to each side of the equation.
87 + -1b = 39 + b + -1b

Combine like terms: b + -1b = 0
87 + -1b = 39 + 0
87 + -1b = 39

Add '-87' to each side of the equation.
87 + -87 + -1b = 39 + -87

Combine like terms: 87 + -87 = 0
0 + -1b = 39 + -87
-1b = 39 + -87

Combine like terms: 39 + -87 = -48
-1b = -48

Divide each side by '-1'.
b = 48

Simplifying
b = 48

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