Răspunsuri

2014-05-28T14:01:38+03:00
[{x+7}x6-10]:4+5=25
[{x+7}x6-10]:4=25-5
[{x+7}x6-10]:4=20
{x+7}x6-10=20x4
{x+7}x6-10=80
{x+7}x6=80+10
{x+7}x6=90
x+7=90:6
x+7=15
x=15-7
x=8