Question

A video game costs $ 21 more than a controller. Together, the video game

and the controller cost $ 76. Determine the cost x of the controller
What is the cost of the game?

Answer 1

Answer: The cost of the video game (x) is $48.50 and the cost of the controller (y) is $27.50

Explanation:

A video game (X) costs $21 more than a controller (y), this is (y+21=x). Together, the video game and the controller cost $76 (x+y=76). Determine the cost of x of the controller. What is the cost of the game?

We have to find x and y.

Our equations are:

`x=y+21\\x+y=76`

We can replace x in the second equation by our respective value of x shown in the first equation.

`x+y=76\\(y+21)+y=76\\y+21+y=76\\2y=76-21\\2y=55\\y=(55)/(2)\\ y=27.50`

Now replace to find x.

`x+y=76\\x=76-y\\x=76-27.50\\ x=48.50`