21-7-3=21a

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Solution for 21-7-3=21a equation:


Simplifying
21 + -7 + -3 = 21a

Combine like terms: 21 + -7 = 14
14 + -3 = 21a

Combine like terms: 14 + -3 = 11
11 = 21a

Solving
11 = 21a

Solving for variable 'a'.

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

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

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

Add '-11' to each side of the equation.
11 + -11 + -21a = 0 + -11

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

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

Divide each side by '-21'.
a = 0.5238095238

Simplifying
a = 0.5238095238

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