Question

5a + c = -8a

Solve the equation for the variable a

Answer 1

`5a+c=-8a \\ 5a+c-5a=-8a-5a \\ c=-13a \\ (c)/(-13) = (-13a)/(-13) \\ -(c)/(13) =a`

Answer 2

`5a+c=-8a \\\\ 5a+8a=-c \\\\ 13a=-c \\\\ \boxed{a=-(c)/(13)}`