40=40-2x

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Solution for 40=40-2x equation:


Simplifying
40 = 40 + -2x

Add '-40' to each side of the equation.
40 + -40 = 40 + -40 + -2x

Combine like terms: 40 + -40 = 0
0 = 40 + -40 + -2x

Combine like terms: 40 + -40 = 0
0 = 0 + -2x
0 = -2x

Solving
0 = -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
0 + 2x = -2x + 2x
Remove the zero:
2x = -2x + 2x

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

Divide each side by '2'.
x = 0

Simplifying
x = 0

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