x+(7.8-1.2)=54.2

Solution for x+(7.8-1.2)=54.2 equation:

Simplifying
x + (7.8 + -1.2) = 54.2

Combine like terms: 7.8 + -1.2 = 6.6
x + (6.6) = 54.2
x + 6.6 = 54.2

Reorder the terms:
6.6 + x = 54.2

Solving
6.6 + x = 54.2

Solving for variable 'x'.

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

Add '-6.6' to each side of the equation.
6.6 + -6.6 + x = 54.2 + -6.6

Combine like terms: 6.6 + -6.6 = 0.0
0.0 + x = 54.2 + -6.6
x = 54.2 + -6.6

Combine like terms: 54.2 + -6.6 = 47.6
x = 47.6

Simplifying
x = 47.6