Barbara

Barbora goes to school with a backpack that is 2 times more expensive than a bag slipper. If the backpack were 36 euros cheaper, it would cost the same as the bag slipper. How many backpacks cost, and how many bag slippers?

Correct answer:

x =  72 eur
y =  36 eur

Step-by-step explanation:

x = 2 · y
x-36 = y

x-2y = 0
x-y = 36

Row 2 - Row 1 → Row 2
x-2y = 0
y = 36


y = 36/1 = 36
x = 0+2y = 0+2 · 36 = 72

x = 72
y = 36

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