Răspunsuri

2014-04-03T22:13:11+03:00
(x+x+1+x+2+x+3+x+4):5=18
(5x+10):5=18
5x+10=18.5
5x=80
x=80:5
x=16
2014-04-03T22:14:04+03:00
A+a+1+a+2+a+3+a+4 totul supra 5 =18
5a+10supra 5=18
5(a+2)supra 5=18 se simplifica si da
a+2=18
a=16