4b-7=b+21

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Solution for 4b-7=b+21 equation:


Simplifying
4b + -7 = b + 21

Reorder the terms:
-7 + 4b = b + 21

Reorder the terms:
-7 + 4b = 21 + b

Solving
-7 + 4b = 21 + 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.
-7 + 4b + -1b = 21 + b + -1b

Combine like terms: 4b + -1b = 3b
-7 + 3b = 21 + b + -1b

Combine like terms: b + -1b = 0
-7 + 3b = 21 + 0
-7 + 3b = 21

Add '7' to each side of the equation.
-7 + 7 + 3b = 21 + 7

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

Combine like terms: 21 + 7 = 28
3b = 28

Divide each side by '3'.
b = 9.333333333

Simplifying
b = 9.333333333

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