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3/x =5/7 I *x
3 = 5/7x I *7/5
x = 3 * 7/5 = 21/5 = 4 1/5
b)
8/3,5 = 4/y I *y
lepiej zamienmy ten ulamek dziesietny na zwykly, poniewaz tutaj musielibysmy stosowac przyblizenia
8 : 3 1/2 * y = 4
8 : 7/2 * y = 4
8 * 2/7 y = 4
16/7y = 4 I *7/16
y = 4 * 7/16 = 7/4 = 1 3/4 = 1,75
c)
5/6 = 1 + t/10
t/10 = 5/6 - 1
t/10 = -1/6 I *10
t = -10/6 = -1 4/6 = -1 2/3
d)
1 / z - 1 = 6,5/8
1/z = 0,8125
z = 1,23
e)
2x - 5/ 3 = 4/5
2x = 4/5 + 5/3
2x = 12/15 + 25/15
2x = 37/15 I :2
x = 37/30 = 1 7/30
f)
10/1,5 = 8/ 9 - 3x
3x = 8/9 - 10/1,5
3x = 8/9 - 6,(6)
3x = 8/9 - 6 2/3
3x = 8/9 - 6 6/9
3x = 8/9 - 5 15/9 = -5 7/9
3x = -52/9 I :3
x = -52/27 = -1 25/27