Let cost of each candy bar, and soda, be C and S, respectively
Then we get: 6C + 3S = 8.4 ------- eq (i)
Also, 3C + 4S = 7.45 -------- eq (ii)
6C + 8S = 14.9 ------- Multiplying eq (ii) by 2 ------ eq (iii)
5S = 6.5 ------- Subtracting eq (i) from eq (iii)
Cost of a soda, or
The equations are 6x + 3y = 840 cents 3x + 4y = 745 cents I will apply the determinant method (= the Cramers' rule) to find y, the soda's price. y == 130. ANSWER. The soda's price is $1.30.