Rozwiąż ukłąd równań:
20 12
__ - ___ = 1
4 x
10 8
__ + ___ = 4
y x
(to ułamki)
20/4-12/x=1 \*4x
20x-48=4x
20x-4x=48
16x=48 \:16
x=3
10/y+8/3=4\*3y
30+8y=12y
8y-12y=-30
-4y=-30 \:-4
y=7,5
5-12/x=1
10/y+8/x=4
12/x=4
10/y+8/3=4
10/y+2 2/3=4
10/y=1 1/3
10/y=4/3
4y=30
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20/4-12/x=1 \*4x
20x-48=4x
20x-4x=48
16x=48 \:16
x=3
10/y+8/3=4\*3y
30+8y=12y
8y-12y=-30
-4y=-30 \:-4
y=7,5
5-12/x=1
10/y+8/x=4
12/x=4
10/y+8/x=4
x=3
10/y+8/3=4
x=3
10/y+2 2/3=4
x=3
10/y=1 1/3
x=3
10/y=4/3
x=3
4y=30
x=3
y=7,5