x+15.3+6=78

Solution for x+15.3+6=78 equation:

Simplifying
x + 15.3 + 6 = 78

Reorder the terms:
15.3 + 6 + x = 78

Combine like terms: 15.3 + 6 = 21.3
21.3 + x = 78

Solving
21.3 + x = 78

Solving for variable 'x'.

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

Add '-21.3' to each side of the equation.
21.3 + -21.3 + x = 78 + -21.3

Combine like terms: 21.3 + -21.3 = 0.0
0.0 + x = 78 + -21.3
x = 78 + -21.3

Combine like terms: 78 + -21.3 = 56.7
x = 56.7

Simplifying
x = 56.7