10a-2a-9=39

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Solution for 10a-2a-9=39 equation:


Simplifying
10a + -2a + -9 = 39

Reorder the terms:
-9 + 10a + -2a = 39

Combine like terms: 10a + -2a = 8a
-9 + 8a = 39

Solving
-9 + 8a = 39

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 8a = 39 + 9

Combine like terms: -9 + 9 = 0
0 + 8a = 39 + 9
8a = 39 + 9

Combine like terms: 39 + 9 = 48
8a = 48

Divide each side by '8'.
a = 6

Simplifying
a = 6

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