tim cac so x,y,z biet x -1 phan 2 bang y cong 3 phan 4 bang z-5 phan 6 va 5z - 5x - 4y bang 50
cho:x phan 2=y phan 3= z phan 5 va x×y×z=810 tinh x+y+z
x phan 12 = y phan 9 = z phan 5 va xyz =20
TIM X BIET :
X PHAN 10=Y PHAN 5;Y PHAN 2 =Z PHAN 3 VA 2X -3Y +4Z=330
CHI MIHK NHA THANK NHIEU LM
cho : y+z-x phan x= z+x-y phan y= x+y-z phan z
tính (1+x phan y).(1+y phan z).(1+z phan x)
x phan y= 5 phan 7 va x+y=4,08
Chia so 420 thanh 4 phan sao cho phan 1 va phan 2 ti le voi 2 va 3,phan 2 va 3 ti le voi 4 va 5,phan 3 va phan 4 ti le voi 6 va 7
4x/5=5y/6=10z/11
x phan 2 = y phan 5 va xy = 90
trinh bay ra nha