-b+15=21

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Solution for -b+15=21 equation:


Simplifying
-1b + 15 = 21

Reorder the terms:
15 + -1b = 21

Solving
15 + -1b = 21

Solving for variable 'b'.

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

Add '-15' to each side of the equation.
15 + -15 + -1b = 21 + -15

Combine like terms: 15 + -15 = 0
0 + -1b = 21 + -15
-1b = 21 + -15

Combine like terms: 21 + -15 = 6
-1b = 6

Divide each side by '-1'.
b = -6

Simplifying
b = -6

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