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a)
2x - 5/3 = 4/5
2x = 4/5 + 5/3
2x = 12/15 + 25/15
2x = 37/15
x = 1/2 * 37/15
x = 37/30 = 1 i 7/30
b)
10/1,5 = 8/9 - 3x
10/1,5 - 8/9 = -3x
60/9 - 8/9 = -3x
-3x = 52/9
x = -1/3 * 52/9
x = -52/27 = -13/7
Odgadnij liczbę x spełniającą równianie:
a) 1/x = 5/15
5x = 15
x = 3
b) 2/3 = x/9
3x = 18
x = 6
c) 2/x = 7/21
7x = 42
x = 6
d) x+1/x = 6/4
4 (x+1) = 6x
4x + 4 = 6x
6x - 4x = 4
2x = 4
x = 2