X-1(138-x)(x+13)=180

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Solution for X-1(138-x)(x+13)=180 equation:


Simplifying
X + -1(138 + -1x)(x + 13) = 180

Reorder the terms:
X + -1(138 + -1x)(13 + x) = 180

Multiply (138 + -1x) * (13 + x)
X + -1(138(13 + x) + -1x * (13 + x)) = 180
X + -1((13 * 138 + x * 138) + -1x * (13 + x)) = 180
X + -1((1794 + 138x) + -1x * (13 + x)) = 180
X + -1(1794 + 138x + (13 * -1x + x * -1x)) = 180
X + -1(1794 + 138x + (-13x + -1x2)) = 180

Combine like terms: 138x + -13x = 125x
X + -1(1794 + 125x + -1x2) = 180
X + (1794 * -1 + 125x * -1 + -1x2 * -1) = 180
X + (-1794 + -125x + 1x2) = 180

Reorder the terms:
-1794 + X + -125x + 1x2 = 180

Solving
-1794 + X + -125x + 1x2 = 180

Solving for variable 'X'.

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

Add '1794' to each side of the equation.
-1794 + X + -125x + 1794 + 1x2 = 180 + 1794

Reorder the terms:
-1794 + 1794 + X + -125x + 1x2 = 180 + 1794

Combine like terms: -1794 + 1794 = 0
0 + X + -125x + 1x2 = 180 + 1794
X + -125x + 1x2 = 180 + 1794

Combine like terms: 180 + 1794 = 1974
X + -125x + 1x2 = 1974

Add '125x' to each side of the equation.
X + -125x + 125x + 1x2 = 1974 + 125x

Combine like terms: -125x + 125x = 0
X + 0 + 1x2 = 1974 + 125x
X + 1x2 = 1974 + 125x

Add '-1x2' to each side of the equation.
X + 1x2 + -1x2 = 1974 + 125x + -1x2

Combine like terms: 1x2 + -1x2 = 0
X + 0 = 1974 + 125x + -1x2
X = 1974 + 125x + -1x2

Simplifying
X = 1974 + 125x + -1x2

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