\(\left(2,8x-32\right)\div\frac{2}{3}=-90\)
\(\Rightarrow2,8x-32=-60\)
\(\Rightarrow2,8x=-28\)
\(\Rightarrow x=-10\)
\(\left(4,5-2x\right)\times1\frac{4}{7}=\frac{11}{14}\)
\(\Rightarrow4,5-2x=\frac{1}{2}\)
\(\Rightarrow2x=4\)
\(\Rightarrow x=2\)
Tìm x biết
\(a,\left[20\%x+\frac{2}{5}x-2\right]\div\frac{1}{3}=2013\)
\(b,\left[4,5-2\left|x\right|\right]\times1\frac{4}{7}=\frac{11}{14}\)
1. Tính giá trị biểu thức:
\(A=-1,6:\left(1+\frac{2}{3}\right)\)
\(B=1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)
2. Tìm x:
a, \(\left(2,8x-32\right):\frac{2}{3}=-90\)
b, \(\left(4,5-2x\right).1\frac{4}{7}=\frac{11}{14}\)
Tìm x biết
(2,8x - 32) : \(\frac{2}{3}\)= -90
(4,5 - 2x) . \(1\frac{4}{7}\)= \(\frac{11}{14}\)
Tìm x, biết:
a) (2,8x-32):\(\frac{2}{3}\)= -90
b) (4,5-2x).1\(\frac{4}{7}\)= \(\frac{11}{14}\)
tìm x
\(|x+3|\div\left(-15\right)=\frac{1}{3}\)
\(|4,5-2x|\cdot(-1\frac{4}{7})=\frac{-11}{14}\)
giúp mình với mai mình nộp rồi
Tìm x biết:\(\left(4\frac{1}{2}-\frac{2}{5}x\right)\div\frac{7}{4}=\frac{11}{14}\)
Tìm x
a) \(5\frac{4}{7}:x=13\)
b) \(\left(2,8x-32\right):\frac{2}{3}=-90\)
c) \(\left(1-\frac{3}{10}-x\right)=\left(\frac{19}{10}-1-\frac{2}{5}\right)+\frac{4}{5}=1\)
d) \(7x=3,2+3x\)
CÁC BẠN LÀM ƠN GIẢI HỘ MK VS MAI MK NỘP CHO CÔ RÙI HUHU
Tìm x, biết:
a) (2,8x - 32) : 2/3 = -90
b) (4,5 - 2x) . 1 4/7(hỗn số) = 11/14
Tìm x biết
\(2\frac{x}{7}=\frac{75}{35}\)
\(\left(4,5-2x\right).\frac{14}{7}=\frac{11}{4}\)
