20=a(4+16)-8

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Solution for 20=a(4+16)-8 equation: 


Simplifying
20 = a(4 + 16) + -8

Combine like terms: 4 + 16 = 20
20 = a(20) + -8

Reorder the terms for easier multiplication:
20 = 20a + -8

Reorder the terms:
20 = -8 + 20a

Solving
20 = -8 + 20a

Solving for variable 'a'.

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

Add '-20a' to each side of the equation.
20 + -20a = -8 + 20a + -20a

Combine like terms: 20a + -20a = 0
20 + -20a = -8 + 0
20 + -20a = -8

Add '-20' to each side of the equation.
20 + -20 + -20a = -8 + -20

Combine like terms: 20 + -20 = 0
0 + -20a = -8 + -20
-20a = -8 + -20

Combine like terms: -8 + -20 = -28
-20a = -28

Divide each side by '-20'.
a = 1.4

Simplifying
a = 1.4

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