Rozwiąż układ równań zadanie w załączniku
1/x = a
1/y = b
a + b = 1/6 mnożymy całość przez - 2
2a + 5b = 1/2
- 2a - 2b = - 2/6 = - 1/3
dodajemy stronami
- 2a + 2a - 2b + 5b = - 1/3 + 1/2
3b = - 2/6 + 3/6 = 1/6
b = 1/6 : 3 = 1/6 * 1/3 = 1/18
a + b = 1/6
a + 1/18 = 1/6
a = 1/6 - 1/18 = 3/18 - 1/18 = 2/18 = 1/9
1/x = 1/9
x = 9
1/y = 1/18
y = 18
odp
x = 9 , y = 18
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1/x = a
1/y = b
a + b = 1/6 mnożymy całość przez - 2
2a + 5b = 1/2
- 2a - 2b = - 2/6 = - 1/3
2a + 5b = 1/2
dodajemy stronami
- 2a + 2a - 2b + 5b = - 1/3 + 1/2
3b = - 2/6 + 3/6 = 1/6
b = 1/6 : 3 = 1/6 * 1/3 = 1/18
a + b = 1/6
a + 1/18 = 1/6
a = 1/6 - 1/18 = 3/18 - 1/18 = 2/18 = 1/9
1/x = 1/9
x = 9
1/y = 1/18
y = 18
odp
x = 9 , y = 18