5x_+12.5=23.1

To solve the equation 5x + 12.5 = 23.1, we need to isolate x on one side of the equation.

Subtracting 12.5 from both sides:
5x = 23.1 - 12.5
5x = 10.6

To isolate x, we divide both sides by 5:
x = (10.6) / 5
x = 2.12

Therefore, the solution to the equation 5x + 12.5 = 23.1 is x = 2.12.