Odpowiedź:
a)
-2/x = 5/8
5x = -2 * 8 /:5
x = -16/5 = -3 1/5
b)
c - b/3 = c/5
c - 1/5c = 1/3b
4/5c = 1/3b /*5/4
c = 1/3b * 5/4 = 5/12b
c)
5/z - 4 = 6/z - 3
5/z - 6/z = -3 + 4
-1/z = 1
z = -1
d)
x + 3/2 = x/3
x - 1/3x = -3/2
2/3x = -3/2 /*3/2
x = -3/2 * 3/2 = -9/4 = -2 1/4
e)
x/5 = 4/7 /*5
x = 4/7 * 5 = 20/7 = 2 6/7
Szczegółowe wyjaśnienie:
