7x-42=9x+20

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Solution for 7x-42=9x+20 equation:


Simplifying
7x + -42 = 9x + 20

Reorder the terms:
-42 + 7x = 9x + 20

Reorder the terms:
-42 + 7x = 20 + 9x

Solving
-42 + 7x = 20 + 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 = 20 + 9x + -9x

Combine like terms: 7x + -9x = -2x
-42 + -2x = 20 + 9x + -9x

Combine like terms: 9x + -9x = 0
-42 + -2x = 20 + 0
-42 + -2x = 20

Add '42' to each side of the equation.
-42 + 42 + -2x = 20 + 42

Combine like terms: -42 + 42 = 0
0 + -2x = 20 + 42
-2x = 20 + 42

Combine like terms: 20 + 42 = 62
-2x = 62

Divide each side by '-2'.
x = -31

Simplifying
x = -31

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