7a-78=a

Solution for 7a-78=a equation:

Simplifying
7a + -78 = a

Reorder the terms:
-78 + 7a = a

Solving
-78 + 7a = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-78 + 7a + -1a = a + -1a

Combine like terms: 7a + -1a = 6a
-78 + 6a = a + -1a

Combine like terms: a + -1a = 0
-78 + 6a = 0

Add '78' to each side of the equation.
-78 + 78 + 6a = 0 + 78

Combine like terms: -78 + 78 = 0
0 + 6a = 0 + 78
6a = 0 + 78

Combine like terms: 0 + 78 = 78
6a = 78

Divide each side by '6'.
a = 13

Simplifying
a = 13