1a+2b+3=0

Solution for 1a+2b+3=0 equation:

Simplifying
1a + 2b + 3 = 0

Reorder the terms:
3 + 1a + 2b = 0

Solving
3 + 1a + 2b = 0

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + 1a + -3 + 2b = 0 + -3

Reorder the terms:
3 + -3 + 1a + 2b = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 1a + 2b = 0 + -3
1a + 2b = 0 + -3

Combine like terms: 0 + -3 = -3
1a + 2b = -3

Add '-2b' to each side of the equation.
1a + 2b + -2b = -3 + -2b

Combine like terms: 2b + -2b = 0
1a + 0 = -3 + -2b
1a = -3 + -2b

Divide each side by '1'.
a = -3 + -2b

Simplifying
a = -3 + -2b