18=a-3.3

Solution for 18=a-3.3 equation:

Simplifying
18 = a + -3.3

Reorder the terms:
18 = -3.3 + a

Solving
18 = -3.3 + 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.
18 + -1a = -3.3 + a + -1a

Combine like terms: a + -1a = 0
18 + -1a = -3.3 + 0
18 + -1a = -3.3

Add '-18' to each side of the equation.
18 + -18 + -1a = -3.3 + -18

Combine like terms: 18 + -18 = 0
0 + -1a = -3.3 + -18
-1a = -3.3 + -18

Combine like terms: -3.3 + -18 = -21.3
-1a = -21.3

Divide each side by '-1'.
a = 21.3

Simplifying
a = 21.3