4a+23-9a-17=21

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Solution for 4a+23-9a-17=21 equation:


Simplifying
4a + 23 + -9a + -17 = 21

Reorder the terms:
23 + -17 + 4a + -9a = 21

Combine like terms: 23 + -17 = 6
6 + 4a + -9a = 21

Combine like terms: 4a + -9a = -5a
6 + -5a = 21

Solving
6 + -5a = 21

Solving for variable 'a'.

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

Add '-6' to each side of the equation.
6 + -6 + -5a = 21 + -6

Combine like terms: 6 + -6 = 0
0 + -5a = 21 + -6
-5a = 21 + -6

Combine like terms: 21 + -6 = 15
-5a = 15

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

Simplifying
a = -3

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