Question

one bar of candy A and two bars of candy B have 778 calories. Two bars of candy A and one bar of candy B contain 785 calories. find the caloric content of each candy bar

Answer 1

 A is 264 and B is 257 because 785-778=7. so you add 7 to 785 and get 792 then divide by 3, to find candy A. so you subtract 7 from 778 and get 771 then divide by 3, to find candy B.