1. Aflati numerele naturale x si y stiind ca :
a) (2•x+3)•(2•x+4)= 56
b) (2•x+1)•(2•x+2)•(2•x+3)=720
c) (x-1)•(y+2)=13

2. Rezolvati ecuatiile
a) x+21•11=5⁴-19•3
b)x-(7²-11•4)=29•8-2la5
c)6•x:15+7²•5=15²+17•3-27
d) x-(29•5-12²)=25²-2•11•10
e)18:[(5²-5•x)•2-11]=2
f) 2014-{2015-[2014-(2013-x)]}=12
PS. Exercitiile caietul pentru vacanta clasa a V-a de marius perianu
Catalin miinescu si lucian petrescu