Respuesta :
let x be CDs and y be DVDs
2x + 5y = 138.45
plug in the cost of the CDs for x
2(14.25) + 5y = 138.45
multiply
28.50 + 5y = 138.45
subtract 28.50 from both sides to isolate y
5y = 109.95
divide both sides by 5 to isolate y
y = 21.99
to check if the answer is correct plug in your answer <3
2x + 5y = 138.45
plug in the cost of the CDs for x
2(14.25) + 5y = 138.45
multiply
28.50 + 5y = 138.45
subtract 28.50 from both sides to isolate y
5y = 109.95
divide both sides by 5 to isolate y
y = 21.99
to check if the answer is correct plug in your answer <3