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\(1,23:x-0,45:x=1,5\)
\(\Leftrightarrow\left(1,23-0,45\right):x=1,5\)
\(\Leftrightarrow0,78:x=1,5\)
\(\Leftrightarrow x=0,52\)
Vậy \(x=0,52\)
a) \(x\times17,7-7,7\times x=177\)
\(x\times\left(17,7-7,7\right)=177\)
\(x\times10=177\)
\(x=177:10\)
\(x=17,7\)
b) \(9\times\left(12-2\times x\right)=54\)
\(12-2\times x=54:9\)
\(12-2\times x=6\)
\(2\times x=12:6\)
\(2\times x=2\)
\(x=2:2\)
\(x=1\)
c) \(x\times3,9+x\times0,1=16\)
\(x\times\left(3,9+0,1\right)=16\)
\(x\times4=16\)
\(x=16:4\)
\(x=4\)
d) \(1,23:x-0,45:x=1,5\)
\(x:\left(1,23-0,45\right)=1,5\)
\(x:0,78=1,5\)
\(x=1,5\times0,78\)
\(x=1,17\)
e) \(\dfrac{17}{5}:x=\dfrac{34}{5}:\dfrac{4}{3}\)
\(\dfrac{17}{5}:x=\dfrac{51}{10}\)
\(x=\dfrac{51}{10}:\dfrac{17}{5}\)
\(x=\dfrac{3}{2}\)
\(12,45\times x-0,45\times x+x=3,9.\)
\(\Leftrightarrow x\times\left(12,45-0,45+1\right)=3,9.\)
\(\Leftrightarrow x\times13=3,9.\)
\(\Leftrightarrow x=0,3.\)
Vậy \(x=0,3.\)
a
x * 17,7 - 7,7 * x = 177
x*(17,7-7,7)=177
x*10=177
x=177:10=17,7
B) x * 3,9 + x : 10= 16
x*3,9+x*1/10=16
x*(3,9+1/10)=16
x*4=16
x=16:4=4
C) 1,23 : x - 0,45 : x =15
x*(1,23-0,45)=15
x*0,78=15
x*78/100=15
x=15:78/100=19,23076923...(các bạn tự tính)
Đ) (x - 1/3) * 5/3 = 14/27 - 3/9
(x-1/3)*5/3=5/27
x*1/3=5/27:5/3
x*1/3=1/9
x=1/9:1/3
x=1\3
G) ( 1,2 * 1,5 - x ) * 1/4 = 1,2 * 1,4
(1,2*1,5-x)*1/4=1,68
1,2*1,5-x=1,68:1/4
1,2*1,5-x=6,72
1,8-x=6,72
x=6,72-1,8
x=4,92
h) (84,6 - 2 * x ) : 3,02 = 5,1
(84,6-2 * x)=3,02*5,1
84,6-2*x=15,402
x=84,6-15,402
x*2=69,198
x=69,198:2=34,599
nhớ k cho mình nhá
a)\(\frac{2}{3}\cdot x+\frac{1}{4}=\frac{5}{6}\)
\(\frac{2}{3}\cdot x=\frac{5}{6}-\frac{1}{4}=\frac{7}{12}\)
\(x=\frac{7}{12}:\frac{2}{3}=\frac{7}{8}\)
b) \(\frac{7}{12}-\frac{5}{6}\cdot x=\frac{1}{4}:\frac{2}{3}\)
\(\frac{7}{12}-\frac{5}{6}\cdot x=\frac{3}{8}\)
\(\frac{5}{6}\cdot x=\frac{7}{12}-\frac{3}{8}=\frac{5}{24}\)
\(x=\frac{5}{24}:\frac{5}{6}=\frac{1}{4}\)
c) \(2\frac{1}{3}-\left(x+1\right)=\frac{5}{9}\)
\(\frac{7}{3}-\left(x+1\right)=\frac{5}{9}\)
\(x+1=\frac{7}{3}-\frac{5}{9}=\frac{16}{9}\)
\(x=\frac{16}{9}-1=\frac{7}{9}\)
d) \(\frac{2\cdot x+1}{15}=\frac{3}{5}\)
\(\left(2\cdot x+1\right):15=\frac{3}{5}\)
\(2\cdot x+1=\frac{3}{5}\cdot15=9\)
\(2\cdot x=9-1=8\)
\(x=8:2=4\)
a, 2/3 . x +1/4=5/6
2/3 . x=5/6-1/4
2/3 . x=10/12 -3/12
2/3 . x=7/12
x= 7/12 : 2/3
x=7/8
Vậy x=7/8
`a)0,12 xx x=6`
`x=6:0,12`
`x=50`
`b)x:2,5=4`
`x=2,5xx4`
`x=10`
`c)5,6:x=4`
`x=5,6:4`
`x=1,4`
`d)x xx0,1=2/5`
`x = 2/5:0,1`
`x=2/5 :1/10`
`x=2/5xx10/1`
`x=4`
\(\text{b,9 . (12-2.x)=54}\\ 12-2x=54:9\\ 12-2x=6\\ 2x=12-6\\ 2x=6\\ x=3\)