1-3a=3+a

Solution for 1-3a=3+a equation:

Simplifying
1 + -3a = 3 + a

Solving
1 + -3a = 3 + 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.
1 + -3a + -1a = 3 + a + -1a

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

Combine like terms: a + -1a = 0
1 + -4a = 3 + 0
1 + -4a = 3

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

Combine like terms: 1 + -1 = 0
0 + -4a = 3 + -1
-4a = 3 + -1

Combine like terms: 3 + -1 = 2
-4a = 2

Divide each side by '-4'.
a = -0.5

Simplifying
a = -0.5