3b+15=7n-21

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Solution for 3b+15=7n-21 equation:


Simplifying
3b + 15 = 7n + -21

Reorder the terms:
15 + 3b = 7n + -21

Reorder the terms:
15 + 3b = -21 + 7n

Solving
15 + 3b = -21 + 7n

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 + 3b = -21 + -15 + 7n

Combine like terms: 15 + -15 = 0
0 + 3b = -21 + -15 + 7n
3b = -21 + -15 + 7n

Combine like terms: -21 + -15 = -36
3b = -36 + 7n

Divide each side by '3'.
b = -12 + 2.333333333n

Simplifying
b = -12 + 2.333333333n

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