Question

produsul numerelor a si b este egal cu 12,64 . Micsorand numarul a cu 1,produsul numerelor devine 9,24.Determinati numarul b.

Answer 1

a*b=12.64
(a-1)*b=9.24
ab-b=9.24
ab=9.24+b
a=9.24+b/b
9.24+b/b*b=12.64
9.24+b/b=12.64/b
9.24+b=12.64
b=12.64-9.24
b=3.4
a=12.64/3.4
a=3.7176

Answer 2

a×b=12,64
(a-1)×b=9,24
ab-b=9,24
ab=9,24+b
a=9,24+b/b
9,24+b/4×b=12,64
9,24+b/b=12,64 b
9,24+b=12,64
b=12,64-9,24
b=3,4
a=12,64/3,4
a=3,7176