The cost of 5 similar digital cameras and 3 similar video cameras is $3213, Each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he pay?

Answer 1

V = 4D

5D + 3V = 3213

Substitute 4D for V in the second equation and solve for D. Insert that value into the first equation to solve for V. Check by putting both values into the second equation.

Add D and V.