10a+21=-3-2a

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Solution for 10a+21=-3-2a equation:


Simplifying
10a + 21 = -3 + -2a

Reorder the terms:
21 + 10a = -3 + -2a

Solving
21 + 10a = -3 + -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.
21 + 10a + 2a = -3 + -2a + 2a

Combine like terms: 10a + 2a = 12a
21 + 12a = -3 + -2a + 2a

Combine like terms: -2a + 2a = 0
21 + 12a = -3 + 0
21 + 12a = -3

Add '-21' to each side of the equation.
21 + -21 + 12a = -3 + -21

Combine like terms: 21 + -21 = 0
0 + 12a = -3 + -21
12a = -3 + -21

Combine like terms: -3 + -21 = -24
12a = -24

Divide each side by '12'.
a = -2

Simplifying
a = -2

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