27-7-3=21a

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Solution for 27-7-3=21a equation:


Simplifying
27 + -7 + -3 = 21a

Combine like terms: 27 + -7 = 20
20 + -3 = 21a

Combine like terms: 20 + -3 = 17
17 = 21a

Solving
17 = 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.
17 + -21a = 21a + -21a

Combine like terms: 21a + -21a = 0
17 + -21a = 0

Add '-17' to each side of the equation.
17 + -17 + -21a = 0 + -17

Combine like terms: 17 + -17 = 0
0 + -21a = 0 + -17
-21a = 0 + -17

Combine like terms: 0 + -17 = -17
-21a = -17

Divide each side by '-21'.
a = 0.8095238095

Simplifying
a = 0.8095238095

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