21=14+b

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Solution for 21=14+b equation:


Simplifying
21 = 14 + b

Solving
21 = 14 + 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.
21 + -1b = 14 + b + -1b

Combine like terms: b + -1b = 0
21 + -1b = 14 + 0
21 + -1b = 14

Add '-21' to each side of the equation.
21 + -21 + -1b = 14 + -21

Combine like terms: 21 + -21 = 0
0 + -1b = 14 + -21
-1b = 14 + -21

Combine like terms: 14 + -21 = -7
-1b = -7

Divide each side by '-1'.
b = 7

Simplifying
b = 7

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