7x-5x-20=12-40

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Solution for 7x-5x-20=12-40 equation:


Simplifying
7x + -5x + -20 = 12 + -40

Reorder the terms:
-20 + 7x + -5x = 12 + -40

Combine like terms: 7x + -5x = 2x
-20 + 2x = 12 + -40

Combine like terms: 12 + -40 = -28
-20 + 2x = -28

Solving
-20 + 2x = -28

Solving for variable 'x'.

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

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

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

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

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

Simplifying
x = -4

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