4a+20=84

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Solution for 4a+20=84 equation: 


Simplifying
4a + 20 = 84

Reorder the terms:
20 + 4a = 84

Solving
20 + 4a = 84

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 + 4a = 84 + -20

Combine like terms: 20 + -20 = 0
0 + 4a = 84 + -20
4a = 84 + -20

Combine like terms: 84 + -20 = 64
4a = 64

Divide each side by '4'.
a = 16

Simplifying
a = 16

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