-3=4a-a

Solution for -3=4a-a equation:

Simplifying
-3 = 4a + -1a

Combine like terms: 4a + -1a = 3a
-3 = 3a

Solving
-3 = 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-3 + -3a = 3a + -3a

Combine like terms: 3a + -3a = 0
-3 + -3a = 0

Add '3' to each side of the equation.
-3 + 3 + -3a = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -3a = 0 + 3
-3a = 0 + 3

Combine like terms: 0 + 3 = 3
-3a = 3

Divide each side by '-3'.
a = -1

Simplifying
a = -1