28-X+3X+30-X+X=40

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Solution for 28-X+3X+30-X+X=40 equation:


Simplifying
28 + -1X + 3X + 30 + -1X + X = 40

Reorder the terms:
28 + 30 + -1X + 3X + -1X + X = 40

Combine like terms: 28 + 30 = 58
58 + -1X + 3X + -1X + X = 40

Combine like terms: -1X + 3X = 2X
58 + 2X + -1X + X = 40

Combine like terms: 2X + -1X = 1X
58 + 1X + X = 40

Combine like terms: 1X + X = 2X
58 + 2X = 40

Solving
58 + 2X = 40

Solving for variable 'X'.

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

Add '-58' to each side of the equation.
58 + -58 + 2X = 40 + -58

Combine like terms: 58 + -58 = 0
0 + 2X = 40 + -58
2X = 40 + -58

Combine like terms: 40 + -58 = -18
2X = -18

Divide each side by '2'.
X = -9

Simplifying
X = -9

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