Question

intr-un camion sunt 420 de scanduri de bradsi stejar . Daca numarul scandurilor de brad este cu 80 mai mare decat al celor de stejar , afati cate scanduri de brad si cate de stejar sunt in camiaon . Pls repede

Answer 1

b+s=420

b=s+80, inlocuim pe b in prima ecuatie

s+80+s=420

2s=420-80=340

s=340/2=170 scanduri de stejar

b=170+80=250 scanduri de brad

Answer 2

420-80=340 340:2=170 170+80=250


                                                            R scanduri de brad:250
                                                               scanduri de stejar:170