40=28-2(X-1)

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Solution for 40=28-2(X-1) equation: 


Simplifying
40 = 28 + -2(X + -1)

Reorder the terms:
40 = 28 + -2(-1 + X)
40 = 28 + (-1 * -2 + X * -2)
40 = 28 + (2 + -2X)

Combine like terms: 28 + 2 = 30
40 = 30 + -2X

Solving
40 = 30 + -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 = 30 + -2X + 2X

Combine like terms: -2X + 2X = 0
40 + 2X = 30 + 0
40 + 2X = 30

Add '-40' to each side of the equation.
40 + -40 + 2X = 30 + -40

Combine like terms: 40 + -40 = 0
0 + 2X = 30 + -40
2X = 30 + -40

Combine like terms: 30 + -40 = -10
2X = -10

Divide each side by '2'.
X = -5

Simplifying
X = -5

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