20.6=a-7.2

Solution for 20.6=a-7.2 equation:

Simplifying
20.6 = a + -7.2

Reorder the terms:
20.6 = -7.2 + a

Solving
20.6 = -7.2 + 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.
20.6 + -1a = -7.2 + a + -1a

Combine like terms: a + -1a = 0
20.6 + -1a = -7.2 + 0
20.6 + -1a = -7.2

Add '-20.6' to each side of the equation.
20.6 + -20.6 + -1a = -7.2 + -20.6

Combine like terms: 20.6 + -20.6 = 0.0
0.0 + -1a = -7.2 + -20.6
-1a = -7.2 + -20.6

Combine like terms: -7.2 + -20.6 = -27.8
-1a = -27.8

Divide each side by '-1'.
a = 27.8

Simplifying
a = 27.8