7x+3(x-6)=72

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Solution for 7x+3(x-6)=72 equation:


Simplifying
7x + 3(x + -6) = 72

Reorder the terms:
7x + 3(-6 + x) = 72
7x + (-6 * 3 + x * 3) = 72
7x + (-18 + 3x) = 72

Reorder the terms:
-18 + 7x + 3x = 72

Combine like terms: 7x + 3x = 10x
-18 + 10x = 72

Solving
-18 + 10x = 72

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 10x = 72 + 18

Combine like terms: -18 + 18 = 0
0 + 10x = 72 + 18
10x = 72 + 18

Combine like terms: 72 + 18 = 90
10x = 90

Divide each side by '10'.
x = 9

Simplifying
x = 9

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