Răspuns :
6 × u = 4 × p
p = 9 + u
6 × u = 4 × ( 9 + u )
6 × u = 4 × 9 + 4 × u
6 × u = 36 + 4 × u
6 × u - 4 × u = 36
2 × u = 36
u = 36 : 2
u = 18
p = 9 + 18
p = 27
500 - 2 × 18 - 3 × 27 =
500 - 36 - 81 =
464 - 81 = 383 lei primește Andrei
6 × u = 4 × p
p = 9 + u
6 × u = 4 × ( 9 + u )
6 × u = 4 × 9 + 4 × u
6 × u = 36 + 4 × u
6 × u - 4 × u = 36
2 × u = 36
u = 36 : 2
u = 18
p = 9 + 18
p = 27
500 - 2 × 18 - 3 × 27 =
500 - 36 - 81 =
464 - 81 = 383 lei primește Andrei