3x+7(x-4)=72

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Solution for 3x+7(x-4)=72 equation:


Simplifying
3x + 7(x + -4) = 72

Reorder the terms:
3x + 7(-4 + x) = 72
3x + (-4 * 7 + x * 7) = 72
3x + (-28 + 7x) = 72

Reorder the terms:
-28 + 3x + 7x = 72

Combine like terms: 3x + 7x = 10x
-28 + 10x = 72

Solving
-28 + 10x = 72

Solving for variable 'x'.

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

Add '28' to each side of the equation.
-28 + 28 + 10x = 72 + 28

Combine like terms: -28 + 28 = 0
0 + 10x = 72 + 28
10x = 72 + 28

Combine like terms: 72 + 28 = 100
10x = 100

Divide each side by '10'.
x = 10

Simplifying
x = 10

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