-20=3-5a+2

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Solution for -20=3-5a+2 equation:


Simplifying
-20 = 3 + -5a + 2

Reorder the terms:
-20 = 3 + 2 + -5a

Combine like terms: 3 + 2 = 5
-20 = 5 + -5a

Solving
-20 = 5 + -5a

Solving for variable 'a'.

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

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

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

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

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

Combine like terms: 5 + 20 = 25
5a = 25

Divide each side by '5'.
a = 5

Simplifying
a = 5

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