40=-2(4-x)

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Solution for 40=-2(4-x) equation:


Simplifying
40 = -2(4 + -1x)
40 = (4 * -2 + -1x * -2)
40 = (-8 + 2x)

Solving
40 = -8 + 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.
40 + -2x = -8 + 2x + -2x

Combine like terms: 2x + -2x = 0
40 + -2x = -8 + 0
40 + -2x = -8

Add '-40' to each side of the equation.
40 + -40 + -2x = -8 + -40

Combine like terms: 40 + -40 = 0
0 + -2x = -8 + -40
-2x = -8 + -40

Combine like terms: -8 + -40 = -48
-2x = -48

Divide each side by '-2'.
x = 24

Simplifying
x = 24

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