a-3y=42

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Solution for a-3y=42 equation: 


Simplifying
a + -3y = 42

Solving
a + -3y = 42

Solving for variable 'a'.

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

Add '3y' to each side of the equation.
a + -3y + 3y = 42 + 3y

Combine like terms: -3y + 3y = 0
a + 0 = 42 + 3y
a = 42 + 3y

Simplifying
a = 42 + 3y

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