Question

Ronald is participating in a slimming course. His current mass is 75.5 kg and he intends to reach his ideal weight, 53 kg by reducing his mass by 5/2 kg in each month. He successfully achieved his ideal weight on the x-th month. Find the x-th month.​

Answer 1

Explanation:

`75.5kg - ( (5)/(2)kg )/(month) * (x \: month) = 53kg \\ 75.5kg - 53kg = ( (5)/(2)kg )/(month) * (x \: month) \\ 22.5kg = (5)/(2) kg * x \\ (22.5kg)/( (5)/(2) kg) = ((5)/(2) kg * x)/( (5)/(2) kg ) \\ x = 9`

Therefore, Ronald achieved his goal of 53 kg after 9 months.