6b+15=2b+21

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Solution for 6b+15=2b+21 equation:


Simplifying
6b + 15 = 2b + 21

Reorder the terms:
15 + 6b = 2b + 21

Reorder the terms:
15 + 6b = 21 + 2b

Solving
15 + 6b = 21 + 2b

Solving for variable 'b'.

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

Add '-2b' to each side of the equation.
15 + 6b + -2b = 21 + 2b + -2b

Combine like terms: 6b + -2b = 4b
15 + 4b = 21 + 2b + -2b

Combine like terms: 2b + -2b = 0
15 + 4b = 21 + 0
15 + 4b = 21

Add '-15' to each side of the equation.
15 + -15 + 4b = 21 + -15

Combine like terms: 15 + -15 = 0
0 + 4b = 21 + -15
4b = 21 + -15

Combine like terms: 21 + -15 = 6
4b = 6

Divide each side by '4'.
b = 1.5

Simplifying
b = 1.5

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