3x(x-5)-3x(x-7)=72

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Solution for 3x(x-5)-3x(x-7)=72 equation:


Simplifying
3x(x + -5) + -3x(x + -7) = 72

Reorder the terms:
3x(-5 + x) + -3x(x + -7) = 72
(-5 * 3x + x * 3x) + -3x(x + -7) = 72
(-15x + 3x2) + -3x(x + -7) = 72

Reorder the terms:
-15x + 3x2 + -3x(-7 + x) = 72
-15x + 3x2 + (-7 * -3x + x * -3x) = 72
-15x + 3x2 + (21x + -3x2) = 72

Reorder the terms:
-15x + 21x + 3x2 + -3x2 = 72

Combine like terms: -15x + 21x = 6x
6x + 3x2 + -3x2 = 72

Combine like terms: 3x2 + -3x2 = 0
6x + 0 = 72
6x = 72

Solving
6x = 72

Solving for variable 'x'.

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

Divide each side by '6'.
x = 12

Simplifying
x = 12

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