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9/12 . x + 1/4 .x = 3/4
(9/12 + 1/4) .x = 3/4
1 .x = 3/4
x = 3/4 : 1
x = 3/4
Trả lời:
\(\frac{9}{12}\cdot x+\frac{1}{4}\cdot x=\frac{3}{4}\)
\(\left(\frac{9}{12}+\frac{1}{4}\right)\cdot x=\frac{3}{4}\)
\(1\cdot x=\frac{3}{4}\)
\(x=\frac{3}{4}:1\)
\(x=\frac{3}{4}\)
cau1 x= 1/2 + 3/4
x= 5 / 4
cau2 x = 8 x 1/4
x= 2
cau 3 x= 5/12 - 1/6
x = 1/4
cau 4 x = 4/5 - 1/10
x = 7/10
cau5 x= 2/5 : 1/3
x= 6/5
cau6 x =2/3 : 2/7
x = 7/3
a) X x 4 + X x 5 = 3584 + 179
X x 4 + X x 5 = 3763
X x ( 4 + 5 ) = 3763
X x 9 = 3763
X = 3763 : 9
X = \(481\frac{1}{9}\)
b , X x 12 + 475 = 8095
X x 12 = 8095 - 475
X x 12 = 7620
X = 7620 : 12
X = 635
6/x = 4/6 ; 6/x giữ nguyên 4/6 = 2/3 = 6/9 => x= 9
x/72 = 10/16 ; 10/16 = 5/8 = 45/72 => x = 45
x + 1/6 = 2/3 x = 2/3 - 1/6 = 1/2 => x = 1/2
x - 2/12 = 3/4 x = 3/4 + 2/12 = 11/12
x +\(\frac{1}{6}\)=\(\frac{1}{3}\)-\(\frac{1}{4}\)
x +\(\frac{1}{6}\)=\(\frac{1}{12}\)
x =\(\frac{1}{12}\)-\(\frac{1}{6}\)
x =\(-\frac{1}{12}\)
x -\(\frac{5}{12}\)=\(\frac{1}{3}+\frac{1}{4}\)
x -\(\frac{5}{12}\)=\(\frac{7}{12}\)
x =\(\frac{7}{12}\)+\(\frac{5}{12}\)
x = 1
x +\(\frac{1}{2}\)=\(\frac{4}{5}\)
x =\(\frac{4}{5}\)-\(\frac{1}{2}\)
x =\(\frac{3}{10}\)
x -\(\frac{1}{6}\)=\(\frac{1}{2}\)+\(\frac{1}{3}\)
x -\(\frac{1}{6}\)=\(\frac{5}{6}\)
x =\(\frac{5}{6}\)+\(\frac{1}{6}\)
x = 1
x +\(\frac{1}{8}\)=\(\frac{1}{2}\)-\(\frac{1}{3}\)
x +\(\frac{1}{8}\)=\(\frac{1}{6}\)
x =\(\frac{1}{6}\)-\(\frac{1}{8}\)
x =\(\frac{1}{24}\)
Học tốt!!!
\(x+\dfrac{1}{4}=12\)
\(x=12-\dfrac{1}{4}\)
\(x=\dfrac{47}{4}\)
\(x+\dfrac{1}{4}=12\)
\(x=12-\dfrac{1}{4}\)
\(x=\dfrac{47}{4}\)
Vậy \(x=\dfrac{47}{4}\)