40=2x+4(12-x)

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Solution for 40=2x+4(12-x) equation:


Simplifying
40 = 2x + 4(12 + -1x)
40 = 2x + (12 * 4 + -1x * 4)
40 = 2x + (48 + -4x)

Reorder the terms:
40 = 48 + 2x + -4x

Combine like terms: 2x + -4x = -2x
40 = 48 + -2x

Solving
40 = 48 + -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 = 48 + -2x + 2x

Combine like terms: -2x + 2x = 0
40 + 2x = 48 + 0
40 + 2x = 48

Add '-40' to each side of the equation.
40 + -40 + 2x = 48 + -40

Combine like terms: 40 + -40 = 0
0 + 2x = 48 + -40
2x = 48 + -40

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

Divide each side by '2'.
x = 4

Simplifying
x = 4

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