Răspuns :
pretul initial=x
x+10%x=240
x+10*x/100=240
x+x/10=240
10x+x=2400
11x=2400
x=2400/11=218,(18)
x+10%x=240
x+10*x/100=240
x+x/10=240
10x+x=2400
11x=2400
x=2400/11=218,(18)