18=7x+b-3x

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Solution for 18=7x+b-3x equation:


Simplifying
18 = 7x + b + -3x

Reorder the terms:
18 = b + 7x + -3x

Combine like terms: 7x + -3x = 4x
18 = b + 4x

Solving
18 = b + 4x

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.
18 + -1b = b + -1b + 4x

Combine like terms: b + -1b = 0
18 + -1b = 0 + 4x
18 + -1b = 4x

Add '-18' to each side of the equation.
18 + -18 + -1b = -18 + 4x

Combine like terms: 18 + -18 = 0
0 + -1b = -18 + 4x
-1b = -18 + 4x

Divide each side by '-1'.
b = 18 + -4x

Simplifying
b = 18 + -4x

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