30=b+12

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Solution for 30=b+12 equation:


Simplifying
30 = b + 12

Reorder the terms:
30 = 12 + b

Solving
30 = 12 + 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.
30 + -1b = 12 + b + -1b

Combine like terms: b + -1b = 0
30 + -1b = 12 + 0
30 + -1b = 12

Add '-30' to each side of the equation.
30 + -30 + -1b = 12 + -30

Combine like terms: 30 + -30 = 0
0 + -1b = 12 + -30
-1b = 12 + -30

Combine like terms: 12 + -30 = -18
-1b = -18

Divide each side by '-1'.
b = 18

Simplifying
b = 18

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