ATC camp

The owner of the campsite offers 79 places in 22 cabins. How many of them are triple and quadruple?

Correct answer:

x =  9
y =  13

Step-by-step explanation:


x+y=22
3x+4y=79

x+y=22
3·x+4·y=79

x+y = 22
3x+4y = 79

Pivot: Row 1 ↔ Row 2
3x+4y = 79
x+y = 22

Row 2 - 1/3 · Row 1 → Row 2
3x+4y = 79
-0.33y = -4.33


y = -4.33333333/-0.33333333 = 13
x = 79-4y/3 = 79-4 · 13/3 = 9

x = 9
y = 13

Our linear equations calculator calculates it.



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