78=(6)-6a-5

Solution for 78=(6)-6a-5 equation:

Simplifying
78 = (6) + -6a + -5
78 = 6 + -6a + -5

Reorder the terms:
78 = 6 + -5 + -6a

Combine like terms: 6 + -5 = 1
78 = 1 + -6a

Solving
78 = 1 + -6a

Solving for variable 'a'.

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

Add '6a' to each side of the equation.
78 + 6a = 1 + -6a + 6a

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

Add '-78' to each side of the equation.
78 + -78 + 6a = 1 + -78

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

Combine like terms: 1 + -78 = -77
6a = -77

Divide each side by '6'.
a = -12.83333333

Simplifying
a = -12.83333333