3a+9-a+8=

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Solution for 3a+9-a+8= equation:


Simplifying
3a + 9 + -1a + 8 = 0

Reorder the terms:
9 + 8 + 3a + -1a = 0

Combine like terms: 9 + 8 = 17
17 + 3a + -1a = 0

Combine like terms: 3a + -1a = 2a
17 + 2a = 0

Solving
17 + 2a = 0

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 = 0 + -17

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

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

Divide each side by '2'.
a = -8.5

Simplifying
a = -8.5

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