a) \(x\times4+\frac{1}{2}\times x=55,35\)
\(x\times\left(4+\frac{1}{2}\right)=55,35\)
\(x\times4,5=55,35\)
\(x=55,35:4,5=12,3\)
b) \(x-20\%\times x=216\)
\(x-0,2\times x=216\)
\(x\times\left(1-0,2\right)=216\)
\(x\times0,8=216\)
\(x=216:0,8=270\)
Cảm ơn bn rất rất rất nhiều nha!!!😁😁😁
Tìm X biết:
a, XXX - XX + X = 101
cần gấp!
tìm x và số thập phân a,bc biết:a,bc x xx =77,33
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
Tim x
a,Xx3x5=2,7
b,1,2;Xx4=20
bài 1 số
3,24:4=64,8 : .....
48,8:2 : 20=...... :5
0,12x0,5=0,12x..... x[2,5x4]
bài 2 tính bằng cách hợp lí
4,23x8+8,46=
1,2+2,2+3,2+ .......+ 200,2
bài 3 tìm x
xx4=7,2+6,7
Tìm X:
a,X-20/11x13 - 20/13x15 - 20/15x17-...-20/53x55 = 3/11
b,1/21 + 1/28 + 1/36 + .....+ 2/Xx(X+1) = 2/9
tìm x:
a, X+20%xX=7,2
b,40%xX+X+20%=7,2
giúp mk nhé mai nộp rùi
Tìm x
a \(\frac{3}{4}+\frac{1}{4}xX=2\)
b X - \(\frac{2}{3}x\frac{9}{4}=2,5-\frac{1}{2}\)
c \(2xX+\frac{1}{3}=\frac{4}{3}\)
d \(X:\frac{2}{3}+0,75=\frac{9}{4}+3\)
e \(\frac{6}{4}:X+\frac{1}{2}=\frac{9}{4}x\frac{2}{3}\)
f \(Xx\frac{3}{5}-\frac{2}{5}=3\frac{3}{4}-1\)
