2a+3-6a=-21

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


Simplifying
2a + 3 + -6a = -21

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

Combine like terms: 2a + -6a = -4a
3 + -4a = -21

Solving
3 + -4a = -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 + -4a = -21 + -3

Combine like terms: 3 + -3 = 0
0 + -4a = -21 + -3
-4a = -21 + -3

Combine like terms: -21 + -3 = -24
-4a = -24

Divide each side by '-4'.
a = 6

Simplifying
a = 6

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