Question

14,15 urgent.40 puncte!!!!va rog!!!!

Answer 1

14. fie a- lungimea si b latimea
a=b+50
(b+20+a-30)*2=400
b+b+50-10=200
2b+40=200
2b=160
b=80
a=80+50=130
P=(80+130)*2=210*2=420
15 fie p1- perimetrul patratului, a-latyra
         p2- drept. b- lungimea, c- latimea
c=a/3
p1+p2=152 si p1-p2=40
p1=p2+40
p2+p2+40=152
2p2=112
p2=56
p1=56+40=96 si p1=4a
a=96/4=24
c=24/3=8
p2=(c+b)*2
8+b=56/2
8+b=28
b=20

lungimea 20cm si latimea 8cm