2a+3-6=-21

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Solution for 2a+3-6=-21 equation:


Simplifying
2a + 3 + -6 = -21

Reorder the terms:
3 + -6 + 2a = -21

Combine like terms: 3 + -6 = -3
-3 + 2a = -21

Solving
-3 + 2a = -21

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 + 3 + 2a = -21 + 3

Combine like terms: -3 + 3 = 0
0 + 2a = -21 + 3
2a = -21 + 3

Combine like terms: -21 + 3 = -18
2a = -18

Divide each side by '2'.
a = -9

Simplifying
a = -9

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