Respuesta :

Red hots = x
Gummy bears = y

3x + y = 21
5x + 3y = 39

y = 21 - 3x
Bring that into 5x + 3y = 39
5x + 3(21 - 3x) = 39
5x + 63 - 9x = 39
4x = 24
x = 4

Bring that into 3x + y = 21
3(4) + y = 21
y = 21-12
y = 9

Hope this helps.

- Max

Answer: A kilogram of cinnamon cost $4

And A kilogram of gummy bears cost $9

Step-by-step explanation: let cinnamon be x and gummy bear be y.

Let's form an equation with the question.

3kg of x + 1kg of y = $21

3x + y = 21........ equation 1

Again 3kg of x + 3kg of y = $39

3x + 3y = 39........ equation 2

Subtract equation 1 from equation 2

2y = 18

Y = 9

Substitute value of y in equation 1

3x + 9 = 21

3x = 21-9

3x = 12

X = 4

So A kilogram of cinnamon cost $4

And A kilogram of gummy bears cost $9

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