30=2b-30

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Solution for 30=2b-30 equation: 


Simplifying
30 = 2b + -30

Reorder the terms:
30 = -30 + 2b

Solving
30 = -30 + 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.
30 + -2b = -30 + 2b + -2b

Combine like terms: 2b + -2b = 0
30 + -2b = -30 + 0
30 + -2b = -30

Add '-30' to each side of the equation.
30 + -30 + -2b = -30 + -30

Combine like terms: 30 + -30 = 0
0 + -2b = -30 + -30
-2b = -30 + -30

Combine like terms: -30 + -30 = -60
-2b = -60

Divide each side by '-2'.
b = 30

Simplifying
b = 30

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