90=5(X-12)

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Solution for 90=5(X-12) equation:


Simplifying
90 = 5(X + -12)

Reorder the terms:
90 = 5(-12 + X)
90 = (-12 * 5 + X * 5)
90 = (-60 + 5X)

Solving
90 = -60 + 5X

Solving for variable 'X'.

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

Add '-5X' to each side of the equation.
90 + -5X = -60 + 5X + -5X

Combine like terms: 5X + -5X = 0
90 + -5X = -60 + 0
90 + -5X = -60

Add '-90' to each side of the equation.
90 + -90 + -5X = -60 + -90

Combine like terms: 90 + -90 = 0
0 + -5X = -60 + -90
-5X = -60 + -90

Combine like terms: -60 + -90 = -150
-5X = -150

Divide each side by '-5'.
X = 30

Simplifying
X = 30

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