5a-a=42

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Solution for 5a-a=42 equation: 


Simplifying
5a + -1a = 42

Combine like terms: 5a + -1a = 4a
4a = 42

Solving
4a = 42

Solving for variable 'a'.

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

Divide each side by '4'.
a = 10.5

Simplifying
a = 10.5

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