3-a=4a

Solution for 3-a=4a equation:

Simplifying
3 + -1a = 4a

Solving
3 + -1a = 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
3 + -1a + -4a = 4a + -4a

Combine like terms: -1a + -4a = -5a
3 + -5a = 4a + -4a

Combine like terms: 4a + -4a = 0
3 + -5a = 0

Add '-3' to each side of the equation.
3 + -3 + -5a = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -5a = 0 + -3
-5a = 0 + -3

Combine like terms: 0 + -3 = -3
-5a = -3

Divide each side by '-5'.
a = 0.6

Simplifying
a = 0.6