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(3/10+4/5x1/2):1/8/9-1/1/3
=(3/10+4/10):17/9-4/3
=7/10:17/9-4/3
=63/170-4/3
=-491/510
\(\frac{23}{12}\)
\(\frac{314}{105}\)
\(\frac{59}{60}\)
\(\frac{199}{90}\)
\(\frac{1}{18}\)
\(\frac{13}{36}\)
\(\frac{4}{221}\)
\(\frac{4}{85}\)
\(x.\frac{1}{2}+\frac{1}{4}x=\frac{4}{5}.3\)
\(\frac{3}{4}x=\frac{12}{5}\)
\(x=\frac{16}{5}\)
Vậy \(x=\frac{16}{5}\)
Suy ra X x 1/2 + 1/4X = 12/5
Suy ra X x ( 2/4 + 1/4)=12/5
Suy ra X x 3/4 = 12/5
Suy ra X = 12/5 : 3/4
Suy ra X = 48/15
\(3+\frac{2}{5}-\frac{3}{4}\times\frac{4}{5}\)
\(=3+\frac{2}{5}+\frac{3}{5}\)
\(=3+1\)
\(=4\)
a, 6/9+5/7+1/3=2/3+5/7+1/3=5/7+1=12/7
b, 17/7+6/5-20/14=17/7+6/5-10/7=6/5+1=11/5
c,2/5x1/4+3/4x2/5=2/5x(1/4+3/4)=2/5x1=2/5
d, 6/11:4/6+5/11:2/3=6/11:2/3+5/11:2/3=(6/11+5/11):2/3=3/2
nha
\(\chi\) \(-\) \(1\) \(nha\)