9+a+5+4a-6=20

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Solution for 9+a+5+4a-6=20 equation:


Simplifying
9 + a + 5 + 4a + -6 = 20

Reorder the terms:
9 + 5 + -6 + a + 4a = 20

Combine like terms: 9 + 5 = 14
14 + -6 + a + 4a = 20

Combine like terms: 14 + -6 = 8
8 + a + 4a = 20

Combine like terms: a + 4a = 5a
8 + 5a = 20

Solving
8 + 5a = 20

Solving for variable 'a'.

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

Add '-8' to each side of the equation.
8 + -8 + 5a = 20 + -8

Combine like terms: 8 + -8 = 0
0 + 5a = 20 + -8
5a = 20 + -8

Combine like terms: 20 + -8 = 12
5a = 12

Divide each side by '5'.
a = 2.4

Simplifying
a = 2.4

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