2a-9=20+5

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Solution for 2a-9=20+5 equation: 


Simplifying
2a + -9 = 20 + 5

Reorder the terms:
-9 + 2a = 20 + 5

Combine like terms: 20 + 5 = 25
-9 + 2a = 25

Solving
-9 + 2a = 25

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 2a = 25 + 9

Combine like terms: -9 + 9 = 0
0 + 2a = 25 + 9
2a = 25 + 9

Combine like terms: 25 + 9 = 34
2a = 34

Divide each side by '2'.
a = 17

Simplifying
a = 17

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