42-18x=12(4x+20)

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Solution for 42-18x=12(4x+20) equation:


Simplifying
42 + -18x = 12(4x + 20)

Reorder the terms:
42 + -18x = 12(20 + 4x)
42 + -18x = (20 * 12 + 4x * 12)
42 + -18x = (240 + 48x)

Solving
42 + -18x = 240 + 48x

Solving for variable 'x'.

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

Add '-48x' to each side of the equation.
42 + -18x + -48x = 240 + 48x + -48x

Combine like terms: -18x + -48x = -66x
42 + -66x = 240 + 48x + -48x

Combine like terms: 48x + -48x = 0
42 + -66x = 240 + 0
42 + -66x = 240

Add '-42' to each side of the equation.
42 + -42 + -66x = 240 + -42

Combine like terms: 42 + -42 = 0
0 + -66x = 240 + -42
-66x = 240 + -42

Combine like terms: 240 + -42 = 198
-66x = 198

Divide each side by '-66'.
x = -3

Simplifying
x = -3

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