Rozwiąż układ równań. a) klamra x/5 - y/4 = 0
x/2 - y/16 = 5,5
x/5 - y/4 = 0 /*20
x/2 - y/16 = 5,5 /*16
4x - 5y = 0
8x - y = 88 /*(-5)
-40x + 5y = -440
_______________
-36x = - 440 (-36)
x=12 = 12
4(12) - 5y = 0
-5y = - 440/9 /:(-5)
y = 88/9 = 9
4x - 5y = 0 /*(-2)
8x - y = 88
-8x + 10y = 0
_________________
8x - 8x + 10y - y = 88
9y = 88 /:9
y = 88/9
y = 9 7/9
4x - 5 * 88/9 = 0
4x - 440/9 = 0
4x = 440/9 / * 1/4
x = 110/9
x = 12 2/9
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x/5 - y/4 = 0 /*20
x/2 - y/16 = 5,5 /*16
4x - 5y = 0
8x - y = 88 /*(-5)
4x - 5y = 0
-40x + 5y = -440
_______________
-36x = - 440 (-36)
x=12 = 12
4x - 5y = 0
4(12) - 5y = 0
-5y = - 440/9 /:(-5)
y = 88/9 = 9
x/5 - y/4 = 0 /*20
x/2 - y/16 = 5,5 /*16
4x - 5y = 0 /*(-2)
8x - y = 88
-8x + 10y = 0
8x - y = 88
_________________
8x - 8x + 10y - y = 88
9y = 88 /:9
y = 88/9
y = 9 7/9
4x - 5 * 88/9 = 0
4x - 440/9 = 0
4x = 440/9 / * 1/4
x = 110/9
x = 12 2/9