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

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

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

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

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

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

Solving
3 + 3a = -1 + 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 + 3a + -4a = -1 + 4a + -4a

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

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

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

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

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

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

Simplifying
a = 4