-4(a-4)=40-a

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Solution for -4(a-4)=40-a equation:


Simplifying
-4(a + -4) = 40 + -1a

Reorder the terms:
-4(-4 + a) = 40 + -1a
(-4 * -4 + a * -4) = 40 + -1a
(16 + -4a) = 40 + -1a

Solving
16 + -4a = 40 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
16 + -4a + a = 40 + -1a + a

Combine like terms: -4a + a = -3a
16 + -3a = 40 + -1a + a

Combine like terms: -1a + a = 0
16 + -3a = 40 + 0
16 + -3a = 40

Add '-16' to each side of the equation.
16 + -16 + -3a = 40 + -16

Combine like terms: 16 + -16 = 0
0 + -3a = 40 + -16
-3a = 40 + -16

Combine like terms: 40 + -16 = 24
-3a = 24

Divide each side by '-3'.
a = -8

Simplifying
a = -8

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