Odpowiedź:
a) 2x-1 / x+2=1 / × (x+2)
2x-1= x+2
x= 3
b) 2=2x-1/5x+4 / × (5x+4)
10x + 8 = 2x - 1
8x = -9/8= - 1 1/8
c) 2x + 2 / x + 7 = -4 / × (x+7)
2x + 2 = -4x - 28
6x = - 30 /6
x = -5
