Question

Stiind ca x+2×y=24 si x+y=19 . Determinați y

Answer 1

x=19-y
19-y+2y=24
y=24-19
y=5
x=19-5=14

Answer 2

Din x+y=19 rezulta x=19-y Acum inlocuim in x+2y=24 si rezulta 19-y+2y=24 19+y=24 y=24-19 y=5