a) 5x+11=371
5x=371-11
5x=360
x=360:5
x=72
b) (24+x):25=15
24+x=15*25
24+x=375
x=375-24
x=371
c) 3^2*[3^*(x:3^2-222)+1^0]+1^1999=10
9*[9*(x:9-222)+1]+1=10
9*[9*(x:9-222)+1]=10-1
9*[9*(x:9-222)+1]=9
[9*x:9-222)+1]=9:9
9*(x:9-222)+1=1
9*(x:9-222)=1-1
9*(x:9-222)=0
x:9-222=0:9
x:9-222=0
x:9=0+222
x:9=222
x=222*9
x=1998
Am facut totul pe lung ca sa vezi cum decurg operatiile,sper sa intelegi.
