5*x-7-x=9-2*x-4
5x-7-x=9-2x-4
4x-7=5-2x
4x+2x=5+7
6x=12
x=2
Sprawdzenie :
5*x-7-x=5*2-7-2=10-7-2=1
9-2*x-4=9-2*2-4=9-4-4=1
L=P
Pozdrowionka! ~Wika :3
