-3a+5-5a=21

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Solution for -3a+5-5a=21 equation:


Simplifying
-3a + 5 + -5a = 21

Reorder the terms:
5 + -3a + -5a = 21

Combine like terms: -3a + -5a = -8a
5 + -8a = 21

Solving
5 + -8a = 21

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + -8a = 21 + -5

Combine like terms: 5 + -5 = 0
0 + -8a = 21 + -5
-8a = 21 + -5

Combine like terms: 21 + -5 = 16
-8a = 16

Divide each side by '-8'.
a = -2

Simplifying
a = -2

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