20-2a=3a+5

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


Simplifying
20 + -2a = 3a + 5

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

Solving
20 + -2a = 5 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
20 + -2a + -3a = 5 + 3a + -3a

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

Combine like terms: 3a + -3a = 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 = -15
-5a = -15

Divide each side by '-5'.
a = 3

Simplifying
a = 3

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