tim x thuoc z biet /x+1/ +/x-2/+/x+7/=5x-10
so sanh -58/89 va 36/-53
tim x thuoc z biet
a) 2x+7 chia het x+3
b) x^2 +5x+11 chia hetx+3
tim x biet 2x+9/x+2 + 5x+17/ x+3 - 3x/ x+3 ( x thuoc Z)
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7
tim x thuoc Z biet x^3-x^2+x-1=0
Tim x thuoc z biet:
A)(x-3)(2y+1)=7
B) (2x+1)(3y-2)=-55
tim x,y thuoc z biet x/5=y/3=z/4 và x-z=7
tim x,y thuộc z biết x/3=y/4=z/5 và 2z+3y+5z=86
tim x, y thuoc Z, biet:
x - y + 2xy bang 7
tim x thuoc z biet (x-5)^x+1-(x-5)^x+5
