21=7B+7

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Solution for 21=7B+7 equation:


Simplifying
21 = 7B + 7

Reorder the terms:
21 = 7 + 7B

Solving
21 = 7 + 7B

Solving for variable 'B'.

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

Add '-7B' to each side of the equation.
21 + -7B = 7 + 7B + -7B

Combine like terms: 7B + -7B = 0
21 + -7B = 7 + 0
21 + -7B = 7

Add '-21' to each side of the equation.
21 + -21 + -7B = 7 + -21

Combine like terms: 21 + -21 = 0
0 + -7B = 7 + -21
-7B = 7 + -21

Combine like terms: 7 + -21 = -14
-7B = -14

Divide each side by '-7'.
B = 2

Simplifying
B = 2

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