7x-28=9x-20

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Solution for 7x-28=9x-20 equation:


Simplifying
7x + -28 = 9x + -20

Reorder the terms:
-28 + 7x = 9x + -20

Reorder the terms:
-28 + 7x = -20 + 9x

Solving
-28 + 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.
-28 + 7x + -9x = -20 + 9x + -9x

Combine like terms: 7x + -9x = -2x
-28 + -2x = -20 + 9x + -9x

Combine like terms: 9x + -9x = 0
-28 + -2x = -20 + 0
-28 + -2x = -20

Add '28' to each side of the equation.
-28 + 28 + -2x = -20 + 28

Combine like terms: -28 + 28 = 0
0 + -2x = -20 + 28
-2x = -20 + 28

Combine like terms: -20 + 28 = 8
-2x = 8

Divide each side by '-2'.
x = -4

Simplifying
x = -4

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