7(3-a)=a

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

Simplifying
7(3 + -1a) = a
(3 * 7 + -1a * 7) = a
(21 + -7a) = a

Solving
21 + -7a = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
21 + -7a + -1a = a + -1a

Combine like terms: -7a + -1a = -8a
21 + -8a = a + -1a

Combine like terms: a + -1a = 0
21 + -8a = 0

Add '-21' to each side of the equation.
21 + -21 + -8a = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -8a = 0 + -21
-8a = 0 + -21

Combine like terms: 0 + -21 = -21
-8a = -21

Divide each side by '-8'.
a = 2.625

Simplifying
a = 2.625