9a-2a+84=168

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Solution for 9a-2a+84=168 equation:


Simplifying
9a + -2a + 84 = 168

Reorder the terms:
84 + 9a + -2a = 168

Combine like terms: 9a + -2a = 7a
84 + 7a = 168

Solving
84 + 7a = 168

Solving for variable 'a'.

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

Add '-84' to each side of the equation.
84 + -84 + 7a = 168 + -84

Combine like terms: 84 + -84 = 0
0 + 7a = 168 + -84
7a = 168 + -84

Combine like terms: 168 + -84 = 84
7a = 84

Divide each side by '7'.
a = 12

Simplifying
a = 12

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