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4x+4y=12
2x+6y=9,20
4x=12-4y
2x=6-2y
6-2y+6y=9,2
4y=3,2
y=0,8
2x=6-2y
x=3-y
x=3-0,8
x=2,2
czekolada 2,20zl, wafelek 80gr.
y-cena jednego wafelka
4x+4y=12
2x+6y=9,20|:2
4x+4y=12
x+3y=4,60
4x+4y=12
x=4,6-3y
4(4,6-3y)+4y=12
x=4,6-3y
18,4-12y+4y=12
x=4,6-3y
18,4-8y=12
x=4,6-3y
-8y=12-18,4
x=4,6-3y
-8y=-6,4| (-8)
x=4,6-3y
y=0,8
x=4,6-3y
y=0,8
x=4,6-3×0,8
y=0,8
x=4,6-2,4
y=0,8
x=2,2
Odp: Czekolada kosztuje 2,20 zl , a wafelek 80gr.
Gwarantuje poprawnosc;))
2x+6y=9,20
4x=12-4y
2x=6-2y
6-2y+6y=9,2
4y=3,2
y=0,8
2x=6-2y
x=3-y
x=3-0,8
x=2,2
czekolada 2,20zl, wafelek 80gr