ta co x,y thuoc N biet
35^x + 9= 2 * 5^9
biet a=22 nhan 34 voi x,y thuoc N* va a co 9 uoc. Tim a
tim cac so x,y,z thuoc Q biet rang (x+y):(5-z):(y+z):(y+9)=3:1:2:5
Ta có:(x+y):(5-z):(y+z):(y+9)=3:1:2:5
=> 5-z=1=>z=4.
y+9=5=>y=-4.
x+y=3=>x-4=3(do y=-4)=>x=7.
Vậy x=7,y=-4,z=4.
tìm x y z thuoc z biet 52/9 = 5+1/x+1/y+1/2
Tim n thuoc N biet so n co 30 uoc va khi phan tich thanh thua so nguyen to thi co dang n = 2^x × 3^y biet x+y =8
Tim n thuoc N , biet so n co 30 uoc va khi phan tich thanh thua so nguyen to thi co dang n = 2^x × 3^y biet x + y = 8
Tim x,y thuoc tap N biet
12.x.y-9.y+20.x=2595
tim x,y thuoc Z biet 25-y^2=9(x-2018)^2
Tìm x:
a) 510 \(⋮\) 25x
B) Tìm x,y thuoc N biet (x - 2)(2x - 1) = 35
a)510=(52)5=255
Vậy 255\(⋮\)25x
\(\Rightarrow\)x=5
Tim x thuoc N biet:
a, (225-x) -81=54
b, 7.(x-14)+35= 25+279:9
c, 7x : 49= 727
a. => 225-x=135
=> x=225-135
Vậy x=90.
b. => 7.(x-14)+35=25+31
=> 7.(x-14)=25+31-35
=> 7.(x-14)=21
=> x-14=3
=> x=3+14
Vậy x=17
c. => 7x:72=727
=> 7x-2=727
=> x-2=27
=> x=27+2
Vậy x=29.