17=9-2a

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Solution for 17=9-2a equation:


Simplifying
17 = 9 + -2a

Solving
17 = 9 + -2a

Solving for variable 'a'.

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

Add '2a' to each side of the equation.
17 + 2a = 9 + -2a + 2a

Combine like terms: -2a + 2a = 0
17 + 2a = 9 + 0
17 + 2a = 9

Add '-17' to each side of the equation.
17 + -17 + 2a = 9 + -17

Combine like terms: 17 + -17 = 0
0 + 2a = 9 + -17
2a = 9 + -17

Combine like terms: 9 + -17 = -8
2a = -8

Divide each side by '2'.
a = -4

Simplifying
a = -4

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