8)L=lungime l=latime 2L+2l=784 l=L-102⇒L=l+102 l+L=784:2 l+l+102=392 2l=290 l=145 cm L=247 cm 9)P= 252 cm P= 2l + 2L L= l+28 cm Rezulta = 2(l+28) + 2l = 252 2l+56 +2l= 252 4l = 252 - 56 4l= 196 l =49 L = l +28= 49 + 28 = 77 cm 10)P : 2 = 473 m P = 473 * 2 P = 946 L = l + 217 P = 2 L + 2 l 946 = 2(l + 217) + 2 l 946 = 2 l +434 + 2 l 4 l = 512 l = 512 : 4 l = 128 cm L = 128 + 217 L = 345 cm 11)|-----| latimea |-----| latimea |-----|-----|-----|-----| lungimea |-----|-----|-----|-----| lungimea Avem 10 parti egale 500:10=50 latimea 50x4=200 lungimea 50+50+200+200=500(verificare)
