Because one of Tom's car wheel weighs 21 2/3 pounds, you would have to multiply 21 2/3 pounds by 4 to get the amount of pounds that all the tires weigh; which makes the answer:86.6666666667
Multiply the first equation by 1.5, to get: Subtract the second equation from this: Substituting into the first equation: Therefore, it takes 1/12 minute to print a black-and-white page, and 1/8 minute to print a colored page.