16x-27y=20
5x+18y=41,5
TO JEST UKLAD RÓWNAN wiec w klamerce.
16x-27y = 20 /*(-5)
5x+18y = 41.5 /*16
-80x+135y = -100
80x+288y = 664
dodajemy stronami
423y = 564 /:423
y = 1.33...
5x+18y = 41.5
5x+18*1.33 = 41.5
5x+23.94 = 41.5
5x = 41.5-23.94
5x = 17.56 /:5
x = 3.512
16x-27y=20 /*4
5x+18y=41,5 /*6
64x-108y=80
30x+108y=249
94x=329 /:94
x=3,5
5*3,5+18y=41,5
17,5+18y=41,5
18y=41,5-17,5
18y=24 /:18
y=24/18 y=4/3
x=3,5=3 1/2
y=4/3
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16x-27y = 20 /*(-5)
5x+18y = 41.5 /*16
-80x+135y = -100
80x+288y = 664
dodajemy stronami
423y = 564 /:423
y = 1.33...
5x+18y = 41.5
5x+18*1.33 = 41.5
5x+23.94 = 41.5
5x = 41.5-23.94
5x = 17.56 /:5
x = 3.512
16x-27y=20 /*4
5x+18y=41,5 /*6
64x-108y=80
30x+108y=249
94x=329 /:94
x=3,5
5*3,5+18y=41,5
17,5+18y=41,5
18y=41,5-17,5
18y=24 /:18
y=24/18 y=4/3
x=3,5=3 1/2
y=4/3