45-a=13

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Solution for 45-a=13 equation: 


Simplifying
45 + -1a = 13

Solving
45 + -1a = 13

Solving for variable 'a'.

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

Add '-45' to each side of the equation.
45 + -45 + -1a = 13 + -45

Combine like terms: 45 + -45 = 0
0 + -1a = 13 + -45
-1a = 13 + -45

Combine like terms: 13 + -45 = -32
-1a = -32

Divide each side by '-1'.
a = 32

Simplifying
a = 32

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