2a+1=a-(3)

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

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

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

Multiply -1 * 3
1 + 2a = a + -3

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

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

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

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

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

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

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

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

Simplifying
a = -4