19=a-4.5

Solution for 19=a-4.5 equation:

Simplifying
19 = a + -4.5

Reorder the terms:
19 = -4.5 + a

Solving
19 = -4.5 + 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.
19 + -1a = -4.5 + a + -1a

Combine like terms: a + -1a = 0
19 + -1a = -4.5 + 0
19 + -1a = -4.5

Add '-19' to each side of the equation.
19 + -19 + -1a = -4.5 + -19

Combine like terms: 19 + -19 = 0
0 + -1a = -4.5 + -19
-1a = -4.5 + -19

Combine like terms: -4.5 + -19 = -23.5
-1a = -23.5

Divide each side by '-1'.
a = 23.5

Simplifying
a = 23.5