Find the rate of change in the cost of running the train for the average speed: 30kmh^-1

75

step-by-step explanation:

you do x-29=46 (the number of cantaloupes sold)

in order to find x, you have to find what minus 29 equals 46, meaning you'd have to add 29 to 46.

29+46=75

if you replace x with 75, the equation looks like:

75-29=46

x=75

step by step explanation: when u removing the parentheses and combined them that would be : x+3y-x-y=2y