2a-a-23+20=15

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Solution for 2a-a-23+20=15 equation:


Simplifying
2a + -1a + -23 + 20 = 15

Reorder the terms:
-23 + 20 + 2a + -1a = 15

Combine like terms: -23 + 20 = -3
-3 + 2a + -1a = 15

Combine like terms: 2a + -1a = 1a
-3 + 1a = 15

Solving
-3 + 1a = 15

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + 1a = 15 + 3

Combine like terms: -3 + 3 = 0
0 + 1a = 15 + 3
1a = 15 + 3

Combine like terms: 15 + 3 = 18
1a = 18

Divide each side by '1'.
a = 18

Simplifying
a = 18

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