25%x+7,5x=-21
1/4x+15/2x=-21
(1/4+15/2)x=-21
31/4x=-21
X= -21:31/4
X= -84/31
Vậy x=-84/31.
25%x+7,5x=-21
1/4x+15/2x=-21
(1/4+15/2)x=-21
31/4x=-21
X= -21:31/4
X= -84/31
Vậy x=-84/31.
Tìm x, biết : 7,5x : (9- hỗn số 6 13/21) = hỗn số 2 12/25
.tìm x:
\(7,5x:\left(9-6\frac{13}{21}\right)=2\frac{13}{25}\)
Tìm x biết: a) 7,5x : \(\left(9-6\frac{13}{21}\right)\)= \(2\frac{14}{25}\)
7,5x:\(\left[9-6\frac{13}{21}\right]=2\frac{13}{25}\)
Tìm x thuộc N, biết:
7,5x : (9- hỗn số 6 13/21)=7. (3/5)^2
tìm x biết:
a,\(7,5x:\left(9-6\frac{13}{21}\right)=2\frac{13}{25}\)
b,\(\frac{\left(1,16-x\right)\cdot5,25}{\left(10\frac{5}{9}-7\frac{1}{4}\right)\cdot2\frac{2}{17}}\)=75%
tìm x
7,5x:(8-118/21)=43/15
3(x-1/2)-2(x+1)=1,25x-1
Tìm x biết
a)2 \(\frac{x}{7}\) =\(\frac{75}{35}\) b)4\(\frac{3}{x}\)=\(\frac{47}{x}\)c)x\(\frac{x}{15}\)=\(\frac{112}{5}\) d)7,5x : ( 9 - 6\(\frac{13}{21}\)) =2\(\frac{13}{25}\)
Tìm x, biết:
a) x : \(\left(3\frac{1}{2}-5\frac{1}{6}\right)\)= \(4\frac{1}{5}-6\frac{2}{3}\)
b) \(\left(2\frac{1}{3}+3\frac{1}{2}\right)\). x = \(-4\frac{1}{4}+3\frac{1}{7}\)
c) 7,5x : \(\left(9-6\frac{13}{21}\right)\) = \(2\frac{13}{25}\)