2a-17=21

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Solution for 2a-17=21 equation: 


Simplifying
2a + -17 = 21

Reorder the terms:
-17 + 2a = 21

Solving
-17 + 2a = 21

Solving for variable 'a'.

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

Add '17' to each side of the equation.
-17 + 17 + 2a = 21 + 17

Combine like terms: -17 + 17 = 0
0 + 2a = 21 + 17
2a = 21 + 17

Combine like terms: 21 + 17 = 38
2a = 38

Divide each side by '2'.
a = 19

Simplifying
a = 19

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