18=15a-3(4a-4)

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Solution for 18=15a-3(4a-4) equation:


Simplifying
18 = 15a + -3(4a + -4)

Reorder the terms:
18 = 15a + -3(-4 + 4a)
18 = 15a + (-4 * -3 + 4a * -3)
18 = 15a + (12 + -12a)

Reorder the terms:
18 = 12 + 15a + -12a

Combine like terms: 15a + -12a = 3a
18 = 12 + 3a

Solving
18 = 12 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
18 + -3a = 12 + 3a + -3a

Combine like terms: 3a + -3a = 0
18 + -3a = 12 + 0
18 + -3a = 12

Add '-18' to each side of the equation.
18 + -18 + -3a = 12 + -18

Combine like terms: 18 + -18 = 0
0 + -3a = 12 + -18
-3a = 12 + -18

Combine like terms: 12 + -18 = -6
-3a = -6

Divide each side by '-3'.
a = 2

Simplifying
a = 2

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