7x+20=9x-20

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


Simplifying
7x + 20 = 9x + -20

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

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

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

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

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

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

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

Combine like terms: -20 + -20 = -40
-2x = -40

Divide each side by '-2'.
x = 20

Simplifying
x = 20

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