Răspuns :
a + a+1 + a+2 + a+3 + a+4 = 85
5a + 10 = 85
5a = 85 - 10 = 75
a = 75 : 5 = 15
a + 1 = 15 + 1 = 16
a + 2 = 15 + 2 = 17
a + 3 = 15 + 3 = 18
a + 4 = 15 + 4 = 19
a x (a + 4) = 15 x 19 = 285 (b)
5a + 10 = 85
5a = 85 - 10 = 75
a = 75 : 5 = 15
a + 1 = 15 + 1 = 16
a + 2 = 15 + 2 = 17
a + 3 = 15 + 3 = 18
a + 4 = 15 + 4 = 19
a x (a + 4) = 15 x 19 = 285 (b)
a+a+1+a+2+a+3+a+4=85
5a+10=85
5a=85-10
5a=75
a=15
b=16
c=17
d=18
e=19
produsul :axe=15a19=285 (raspuns b)
5a+10=85
5a=85-10
5a=75
a=15
b=16
c=17
d=18
e=19
produsul :axe=15a19=285 (raspuns b)