7a+2a-a=30

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Solution for 7a+2a-a=30 equation: 


Simplifying
7a + 2a + -1a = 30

Combine like terms: 7a + 2a = 9a
9a + -1a = 30

Combine like terms: 9a + -1a = 8a
8a = 30

Solving
8a = 30

Solving for variable 'a'.

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

Divide each side by '8'.
a = 3.75

Simplifying
a = 3.75

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