-21-8a=-16(4-5a)

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Solution for -21-8a=-16(4-5a) equation:


Simplifying
-21 + -8a = -16(4 + -5a)
-21 + -8a = (4 * -16 + -5a * -16)
-21 + -8a = (-64 + 80a)

Solving
-21 + -8a = -64 + 80a

Solving for variable 'a'.

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

Add '-80a' to each side of the equation.
-21 + -8a + -80a = -64 + 80a + -80a

Combine like terms: -8a + -80a = -88a
-21 + -88a = -64 + 80a + -80a

Combine like terms: 80a + -80a = 0
-21 + -88a = -64 + 0
-21 + -88a = -64

Add '21' to each side of the equation.
-21 + 21 + -88a = -64 + 21

Combine like terms: -21 + 21 = 0
0 + -88a = -64 + 21
-88a = -64 + 21

Combine like terms: -64 + 21 = -43
-88a = -43

Divide each side by '-88'.
a = 0.4886363636

Simplifying
a = 0.4886363636

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