2+1-a-4=3+3a

Solution for 2+1-a-4=3+3a equation:

Simplifying
2 + 1 + -1a + -4 = 3 + 3a

Reorder the terms:
2 + 1 + -4 + -1a = 3 + 3a

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

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

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

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

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

Divide each side by '-4'.
a = -1

Simplifying
a = -1