16a+21=20-9

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Solution for 16a+21=20-9 equation:


Simplifying
16a + 21 = 20 + -9

Reorder the terms:
21 + 16a = 20 + -9

Combine like terms: 20 + -9 = 11
21 + 16a = 11

Solving
21 + 16a = 11

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + 16a = 11 + -21

Combine like terms: 21 + -21 = 0
0 + 16a = 11 + -21
16a = 11 + -21

Combine like terms: 11 + -21 = -10
16a = -10

Divide each side by '16'.
a = -0.625

Simplifying
a = -0.625

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