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b-mianownik
układ równań:
a+b=46
(a-2) / (b+16) = 0,2
a+b=46 => a=46-b
(a-2) / (b+16) = 0,2 / *(b+16)
a=46-b
a-2 = 0,2(b+16)
a=46-b
(46-b)-2 = 0,2(b+16)
44-b= 0,2b +3, 2
44-3,2 = 0,2b+b
40,8 = 1,2b /*10
408=12b /:2
204=6b /:2
102=3b
b=34
a=46-b=46-34=12
a=12 -licznik
b=34 -mianownik
b- mianownik
a + b = 46
(a-2) / b+16 = 2/10 / × (b+16)
a + b = 46
a-2 = (2b + 32) / 10 / × 10
a + b = 46
10a - 20 = 2b + 32
a+b = 46 /×2
10a - 2b = 32 + 20
2a + 2b = 92
10a - 2b = 52
---------------------
2a + 2b +10a - 2b = 92 + 52
12a = 144 / : 12
a = 12
a+b = 46
a=12
b = 46 - 12
a=12
b = 34 - mianownik
a=12 - licznik
y=mianownik
x+y=46
(x-2) / (y+16)= 0,2 /*(y+16)
x+y=46
x-2=0,2y+8
x+y=46
x-0.2y=10 /*(-1)
x+y=46
-x+0,2y=-10
1,2y=36
y=30
x+y=46
x+30=46
x=46-30
x=16
ten ulamek to 16/30