u-3a=-15

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Solution for u-3a=-15 equation: 


Simplifying
u + -3a = -15

Reorder the terms:
-3a + u = -15

Solving
-3a + u = -15

Solving for variable 'a'.

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

Add '-1u' to each side of the equation.
-3a + u + -1u = -15 + -1u

Combine like terms: u + -1u = 0
-3a + 0 = -15 + -1u
-3a = -15 + -1u

Divide each side by '-3'.
a = 5 + 0.3333333333u

Simplifying
a = 5 + 0.3333333333u

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