4b+18+(-2b)=30+12

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Solution for 4b+18+(-2b)=30+12 equation: 


Simplifying
4b + 18 + (-2b) = 30 + 12

Reorder the terms:
18 + 4b + (-2b) = 30 + 12

Combine like terms: 4b + (-2b) = 2b
18 + 2b = 30 + 12

Combine like terms: 30 + 12 = 42
18 + 2b = 42

Solving
18 + 2b = 42

Solving for variable 'b'.

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

Add '-18' to each side of the equation.
18 + -18 + 2b = 42 + -18

Combine like terms: 18 + -18 = 0
0 + 2b = 42 + -18
2b = 42 + -18

Combine like terms: 42 + -18 = 24
2b = 24

Divide each side by '2'.
b = 12

Simplifying
b = 12

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