Question

One bar of candy A and two bars of candy B have 777 calories. Two bars of candy A and one bar of candy B contain 783 calories. Find the caloric content of each candy bar.

Answer 1

A has 263 calories

B has 257 calories

Explanation:

system of equations:

a + 2b = 777

2a + b = 783

I multiplied the first equation by -2 to eliminate the 'a' terms

-2a - 4b = -1554

+ 2a + b = 783

-3b = -771

b = 257

solve for 'a'

a + 2(257) = 777

a + 514 = 777

a = 263