Răspunsuri

2014-09-24T18:14:27+03:00
-7(x-4)=x+2
-7x+28=x+2
26=8x
x=26:8=3,25
3(x+5)=x+17
3x+15=x+17
2x=2
x=1
2x+5=x+8
x=3
2(x-2)=x-1
2x-4=x-1
x=3