1a+2=-2a-1

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


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

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

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

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

Solving for variable 'a'.

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

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

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

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

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

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

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

Divide each side by '3'.
a = -1

Simplifying
a = -1

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