3(8-7a)=21

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Solution for 3(8-7a)=21 equation: 


Simplifying
3(8 + -7a) = 21
(8 * 3 + -7a * 3) = 21
(24 + -21a) = 21

Solving
24 + -21a = 21

Solving for variable 'a'.

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

Add '-24' to each side of the equation.
24 + -24 + -21a = 21 + -24

Combine like terms: 24 + -24 = 0
0 + -21a = 21 + -24
-21a = 21 + -24

Combine like terms: 21 + -24 = -3
-21a = -3

Divide each side by '-21'.
a = 0.1428571429

Simplifying
a = 0.1428571429

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