18-6a=4a-4a-4(a+3)

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Solution for 18-6a=4a-4a-4(a+3) equation:


Simplifying
18 + -6a = 4a + -4a + -4(a + 3)

Reorder the terms:
18 + -6a = 4a + -4a + -4(3 + a)
18 + -6a = 4a + -4a + (3 * -4 + a * -4)
18 + -6a = 4a + -4a + (-12 + -4a)

Reorder the terms:
18 + -6a = -12 + 4a + -4a + -4a

Combine like terms: 4a + -4a = 0
18 + -6a = -12 + 0 + -4a
18 + -6a = -12 + -4a

Solving
18 + -6a = -12 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
18 + -6a + 4a = -12 + -4a + 4a

Combine like terms: -6a + 4a = -2a
18 + -2a = -12 + -4a + 4a

Combine like terms: -4a + 4a = 0
18 + -2a = -12 + 0
18 + -2a = -12

Add '-18' to each side of the equation.
18 + -18 + -2a = -12 + -18

Combine like terms: 18 + -18 = 0
0 + -2a = -12 + -18
-2a = -12 + -18

Combine like terms: -12 + -18 = -30
-2a = -30

Divide each side by '-2'.
a = 15

Simplifying
a = 15

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