0=a-15

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Solution for 0=a-15 equation: 


Simplifying
0 = a + -15

Reorder the terms:
0 = -15 + a

Solving
0 = -15 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
0 + -1a = -15 + a + -1a
Remove the zero:
-1a = -15 + a + -1a

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

Divide each side by '-1'.
a = 15

Simplifying
a = 15

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