Question

va rog mult de tot exercitiile 7 si 8

Answer 1

7.x+y=110

x=26+3y

26+3y+y=110

4y=84

y=21

x=89

8. x+y=368

x=17+2y

17+2y+y=368

3y=351

y=117

x=251

Answer 2

7. a+b=110, a=110-b, a=3b+26, egalam valorile lui a, 110-b=3b+26, 4b=110-26=84

b=84/4=21, a=110-21= 89

8. a+b=368, b=368-a, b=2a+17, egalam volorile lui b, 368-a=2a+17; 3a=368-17=351, a=351/3=117, b=368-117=251