Twice the difference of a number z and 12 is equal to 10

2(z - 12) = 10 <== ur equation

Well in order to lose a pound you would have to burn 1,500 calories. the more calories you burn the more weight you lose. in order to lose 2 pounds you would have to run 4 hours and 28 minutes.

I’m confused as to what you are asking 66 2/3 percentage wise