45=9-2a

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Solution for 45=9-2a equation:


Simplifying
45 = 9 + -2a

Solving
45 = 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.
45 + 2a = 9 + -2a + 2a

Combine like terms: -2a + 2a = 0
45 + 2a = 9 + 0
45 + 2a = 9

Add '-45' to each side of the equation.
45 + -45 + 2a = 9 + -45

Combine like terms: 45 + -45 = 0
0 + 2a = 9 + -45
2a = 9 + -45

Combine like terms: 9 + -45 = -36
2a = -36

Divide each side by '2'.
a = -18

Simplifying
a = -18

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