18=-7b+9b

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Solution for 18=-7b+9b equation:


Simplifying
18 = -7b + 9b

Combine like terms: -7b + 9b = 2b
18 = 2b

Solving
18 = 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.
18 + -2b = 2b + -2b

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

Add '-18' to each side of the equation.
18 + -18 + -2b = 0 + -18

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

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

Divide each side by '-2'.
b = 9

Simplifying
b = 9

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