Va rog frumos ajutatima la cele doua exercitii

Va Rog Frumos Ajutatima La Cele Doua Exercitii class=

Răspuns :

1) 600×7=4200
2) 26 dm=260 cm
3100 mm=310 cm

2L+2l=L+260
2L+2l=l+310
L+260=l+310
L=l+50

2(l+50)+2l=l+310
2l+100+2l=l+310
3l=210
l=70

L=70+50=120

verificare: 2l+2L=2×120+2×70=240+140=380
L+260=120+260=380

SPER CA TE AM AJUTAT!:)