Question

Daca a×b=15, a×c=24 si a+a×(b+c)=42, atunci a+b+c=?​

Answer 1

Răspuns:

Explicație pas cu pas:

a × b = 15

a × c = 24

a + a × ( b + c ) = 42

a + a×b+a× c = 42

a + 15 + 24 = 42

a + 39 = 42

a = 42 - 39 = 3

3× b = 15

b = 15 : 3 = 5

3 × c = 24

c = 24 : 3 = 8

a + b + c = 3 + 5 + 8 = 16