Răspunsuri

2014-11-17T09:01:20+02:00
2014-11-17T09:27:01+02:00
A)28-4x=16
-4x=16-28
-4x=-12
x=-12/-1
x=3
B)100-20x=90
-20x=90-100
x=-10/-20
x=1/2
c)11-3x=4x-12
-7x=-23
x=-23/-7
x=23/7
D)46=16x-18
16x=46+18
16x=64
x=64/16
x=4
E)2x+4=x+10
x=6
F)36x+4=5
x=1/36
G)81-10/x=5   |*x
81x-10=5x
x=10/76