tim x thuoc n biet : b,(149 nhan 35 : x + 5) nhan 17 =13 va d/(3 nhan x tru 3 ) binh phuong 3 =2 nhan 32 e/5 x+1-5x=500
tim x;y thuoc z biet y phan tru 2 bang x tru 2 nhan y phan x
2 nhan x phan 3 nhan y cong x bang1 phan y
De tim so tu nhien x ,biet rang neu lay so do tru di 3 roi chia cho 8 thi dc 12 ,ta co the viet (x-3) :8=12roi tim x , ta duoc x =99.
Bang cach lam nhu tren ,hay tim so tu nhien x,biet rang neu no nhan voi 3 roi tru di 8 ,sau do chia cho 4 thi dc 7
De tim so tu nhien x,biet rang neu lay so do tru di 3 roi chia cho 8 thi duoc 12 , ta co the viet (x-3) chia cho 8 =12 roi tim x,ta duoc x =99
Bang cach lam nhu tren ,hay tim so tu nhien x ,biet rang neu nhan no voi 3 roi tru di 8 ,sau do chia cho 4 thi duoc 7
Giup minh nha moi nguoi
tim mot phan so co mau la 11 biet rang khi tu tru 18 va nhan mau voi 7 thi duoc mot phan so bang phan so da chotim mot phan so co mau la 11 biet rang khi tu tru 18 va nhan mau voi 7 thi duoc mot phan so bang phan so da cho
tim x thuoc N biet :a,(2 nhan x cong 1 ) binh phuong 2 =625
tim 1 so tu nhien co 3 chu so biet rang binh phuong cua chu so hang chuc bang tich cua 2 chu so kia va so tu nhien do tru di so gom 3 chu so day nhung viet nguoc lai bang 495
tim 1p/s co mau bang 8. biet rang khi tru tu cho 15 va nhan mau voi 6 thi p/s do khong thay doi
tim phan so co mau bang 9 biet rang khi lay tu tru 14 va nhan mau voi 2 thi gia tri ko thay doi