3b+11+7b=21

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


Simplifying
3b + 11 + 7b = 21

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

Combine like terms: 3b + 7b = 10b
11 + 10b = 21

Solving
11 + 10b = 21

Solving for variable 'b'.

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

Add '-11' to each side of the equation.
11 + -11 + 10b = 21 + -11

Combine like terms: 11 + -11 = 0
0 + 10b = 21 + -11
10b = 21 + -11

Combine like terms: 21 + -11 = 10
10b = 10

Divide each side by '10'.
b = 1

Simplifying
b = 1

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