25/100.x+x=5/2
=> 0,25.x+x=2,5
=> x.(0,25+1)=2,5
=> x.1,25 =2,5
=> x =2,5:1,25
=> x =2
Vậy x=2
25/100.x+x=5/2
=> 0,25.x+x=2,5
=> x.(0,25+1)=2,5
=> x.1,25 =2,5
=> x =2,5:1,25
=> x =2
Vậy x=2
tinh nhanh
4 x 125 x 25 x 8
2 x 8 x 50 x25 x125
2 x 3 x 4 x 5 x 50 x 25
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
tim x biet
a)2^x+2 -2^x=96
b)x-(50x/100+25x/200)=111/4
c) (x-5).30/100=200x/100+5
1.Tim cac chu so x va y de so 1x8y2 chia het cho 36
2.tim cac gia tri nguyen cua n de phan so A=3.n+2/n-1 co gia tri la so nguyen
3.tim cac chu so x y thoa man
(x-2)^2.(x-3)^2=4
4.tim so tu nhien x biet
(x-5):3/100=20.x/100 +5
tim x
5^x*5^(x+1)*5^(x+2) < hoặc = 100....0 (18 số 0 )/ 2^18
1 )Tim x, y thuoc Z
x + y = x.y
2) Tim x thuoc Z
(x + 1)+(x+3)+(x+5)+...+(x+99)=0(x-3)+(x-2)+(x-1)+...+10+11=11-12(x-5)+7(3-x)=530(x+2)-6(x-5)-24x=100tim x biet 6+2.x=12+(-5)
b)(-90)-(/x/+10)+100=0
1) Tim x biet :
a) - 12 (x - 5) + 7 . (3 - x) = 5
b) 30 . (x + 2) - 6 . (x - 5) - 24x = 100
tim so tu nhien x biet
(x-5)30/100=20x/100+5
Tim x
16^x<128^4
5x.5x+1.5x+2 < hoặc =100..0:2^18 ( 18 chữ số 0)