21a-16a=-5

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Solution for 21a-16a=-5 equation: 


Simplifying
21a + -16a = -5

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

Solving
5a = -5

Solving for variable 'a'.

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

Divide each side by '5'.
a = -1

Simplifying
a = -1

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