-20=-4(a+1)

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Solution for -20=-4(a+1) equation:


Simplifying
-20 = -4(a + 1)

Reorder the terms:
-20 = -4(1 + a)
-20 = (1 * -4 + a * -4)
-20 = (-4 + -4a)

Solving
-20 = -4 + -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.
-20 + 4a = -4 + -4a + 4a

Combine like terms: -4a + 4a = 0
-20 + 4a = -4 + 0
-20 + 4a = -4

Add '20' to each side of the equation.
-20 + 20 + 4a = -4 + 20

Combine like terms: -20 + 20 = 0
0 + 4a = -4 + 20
4a = -4 + 20

Combine like terms: -4 + 20 = 16
4a = 16

Divide each side by '4'.
a = 4

Simplifying
a = 4

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