-2a-28=4(a-4)

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Solution for -2a-28=4(a-4) equation:


Simplifying
-2a + -28 = 4(a + -4)

Reorder the terms:
-28 + -2a = 4(a + -4)

Reorder the terms:
-28 + -2a = 4(-4 + a)
-28 + -2a = (-4 * 4 + a * 4)
-28 + -2a = (-16 + 4a)

Solving
-28 + -2a = -16 + 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.
-28 + -2a + -4a = -16 + 4a + -4a

Combine like terms: -2a + -4a = -6a
-28 + -6a = -16 + 4a + -4a

Combine like terms: 4a + -4a = 0
-28 + -6a = -16 + 0
-28 + -6a = -16

Add '28' to each side of the equation.
-28 + 28 + -6a = -16 + 28

Combine like terms: -28 + 28 = 0
0 + -6a = -16 + 28
-6a = -16 + 28

Combine like terms: -16 + 28 = 12
-6a = 12

Divide each side by '-6'.
a = -2

Simplifying
a = -2

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