-5(a-4)=40

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Solution for -5(a-4)=40 equation:


Simplifying
-5(a + -4) = 40

Reorder the terms:
-5(-4 + a) = 40
(-4 * -5 + a * -5) = 40
(20 + -5a) = 40

Solving
20 + -5a = 40

Solving for variable 'a'.

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

Add '-20' to each side of the equation.
20 + -20 + -5a = 40 + -20

Combine like terms: 20 + -20 = 0
0 + -5a = 40 + -20
-5a = 40 + -20

Combine like terms: 40 + -20 = 20
-5a = 20

Divide each side by '-5'.
a = -4

Simplifying
a = -4

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