7x+42=9x-18

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Solution for 7x+42=9x-18 equation:


Simplifying
7x + 42 = 9x + -18

Reorder the terms:
42 + 7x = 9x + -18

Reorder the terms:
42 + 7x = -18 + 9x

Solving
42 + 7x = -18 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
42 + 7x + -9x = -18 + 9x + -9x

Combine like terms: 7x + -9x = -2x
42 + -2x = -18 + 9x + -9x

Combine like terms: 9x + -9x = 0
42 + -2x = -18 + 0
42 + -2x = -18

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

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

Combine like terms: -18 + -42 = -60
-2x = -60

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

Simplifying
x = 30

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