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y-bilety ulgowe
x+y=24
x=24-y
16x+11y=289
16*(24-y)+11y=289
384-16y+11y=289
-5y=289-384
-5y=-95/:(-5)
y=19
x+y=24
x+19=24
x=24-19
x=5
odp.kupiono 5 biletów normalnych i 11 ulgowych.
y- biletulgowe - ilość
x+y= 24
x ×16 + y×11= 289
y= 24-x
16x+ 11(24-x)= 289
y= 24-x
16x+264 - 11x=289
y= 24 - x
5x= 289 - 264
y=24-y
5x=25/5
y= 24 - x
x=5
y=24-5
x=5
y=19
x=5
Odp: Kupiono 5 biletów normalnych i 19 ulgowych