Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '-4.58' to each side of the equation.
4.58 + -4.58 + y = 2.5 + -4.58
Combine like terms: 4.58 + -4.58 = 0.00
0.00 + y = 2.5 + -4.58
y = 2.5 + -4.58
Combine like terms: 2.5 + -4.58 = -2.08
y = -2.08
Simplifying
y = -2.08