3(2a-4)-4(2a-6)=72

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Solution for 3(2a-4)-4(2a-6)=72 equation:


Simplifying
3(2a + -4) + -4(2a + -6) = 72

Reorder the terms:
3(-4 + 2a) + -4(2a + -6) = 72
(-4 * 3 + 2a * 3) + -4(2a + -6) = 72
(-12 + 6a) + -4(2a + -6) = 72

Reorder the terms:
-12 + 6a + -4(-6 + 2a) = 72
-12 + 6a + (-6 * -4 + 2a * -4) = 72
-12 + 6a + (24 + -8a) = 72

Reorder the terms:
-12 + 24 + 6a + -8a = 72

Combine like terms: -12 + 24 = 12
12 + 6a + -8a = 72

Combine like terms: 6a + -8a = -2a
12 + -2a = 72

Solving
12 + -2a = 72

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + -2a = 72 + -12

Combine like terms: 12 + -12 = 0
0 + -2a = 72 + -12
-2a = 72 + -12

Combine like terms: 72 + -12 = 60
-2a = 60

Divide each side by '-2'.
a = -30

Simplifying
a = -30

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