3b-21=7b+11

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Solution for 3b-21=7b+11 equation:


Simplifying
3b + -21 = 7b + 11

Reorder the terms:
-21 + 3b = 7b + 11

Reorder the terms:
-21 + 3b = 11 + 7b

Solving
-21 + 3b = 11 + 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 + 3b + -7b = 11 + 7b + -7b

Combine like terms: 3b + -7b = -4b
-21 + -4b = 11 + 7b + -7b

Combine like terms: 7b + -7b = 0
-21 + -4b = 11 + 0
-21 + -4b = 11

Add '21' to each side of the equation.
-21 + 21 + -4b = 11 + 21

Combine like terms: -21 + 21 = 0
0 + -4b = 11 + 21
-4b = 11 + 21

Combine like terms: 11 + 21 = 32
-4b = 32

Divide each side by '-4'.
b = -8

Simplifying
b = -8

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