22-a=15

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Solution for 22-a=15 equation: 


Simplifying
22 + -1a = 15

Solving
22 + -1a = 15

Solving for variable 'a'.

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

Add '-22' to each side of the equation.
22 + -22 + -1a = 15 + -22

Combine like terms: 22 + -22 = 0
0 + -1a = 15 + -22
-1a = 15 + -22

Combine like terms: 15 + -22 = -7
-1a = -7

Divide each side by '-1'.
a = 7

Simplifying
a = 7

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