The cost of 5 similar digital cameras and 3 simial video cameras is $3,213 Each video camera costs 4 times as much as. each digital camera.john buys a digital camera and a video camera.How much dose he pay ?

Answer 1

5 d + 3 v = 3213

v = 4 d

substituting ... 5 d + (3 * 4 d) = 3213 ... 17 d = 3213
... solve for d , then substitute back to find v