8+5a-2=20

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Solution for 8+5a-2=20 equation: 


Simplifying
8 + 5a + -2 = 20

Reorder the terms:
8 + -2 + 5a = 20

Combine like terms: 8 + -2 = 6
6 + 5a = 20

Solving
6 + 5a = 20

Solving for variable 'a'.

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

Add '-6' to each side of the equation.
6 + -6 + 5a = 20 + -6

Combine like terms: 6 + -6 = 0
0 + 5a = 20 + -6
5a = 20 + -6

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

Divide each side by '5'.
a = 2.8

Simplifying
a = 2.8

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