6b+7=4b+21

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Solution for 6b+7=4b+21 equation:


Simplifying
6b + 7 = 4b + 21

Reorder the terms:
7 + 6b = 4b + 21

Reorder the terms:
7 + 6b = 21 + 4b

Solving
7 + 6b = 21 + 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
7 + 6b + -4b = 21 + 4b + -4b

Combine like terms: 6b + -4b = 2b
7 + 2b = 21 + 4b + -4b

Combine like terms: 4b + -4b = 0
7 + 2b = 21 + 0
7 + 2b = 21

Add '-7' to each side of the equation.
7 + -7 + 2b = 21 + -7

Combine like terms: 7 + -7 = 0
0 + 2b = 21 + -7
2b = 21 + -7

Combine like terms: 21 + -7 = 14
2b = 14

Divide each side by '2'.
b = 7

Simplifying
b = 7

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