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\(\frac{1}{3}-\left(\frac{2}{3}-x+\frac{5}{4}\right)=\frac{7}{12}-\left(\frac{5}{2}-\frac{13}{6}\right)\)
\(\frac{1}{3}-\left(\frac{2}{3}-x+\frac{5}{4}\right)=\frac{7}{12}-\frac{1}{3}\)
\(\frac{1}{3}-\left(\frac{2}{3}-x+\frac{5}{4}\right)=\frac{1}{4}\)
\(\frac{2}{3}-x+\frac{5}{4}=\frac{1}{3}-\frac{1}{4}\)
\(\frac{2}{3}-x+\frac{5}{4}=\frac{1}{12}\)
\(\frac{2}{3}-x=\frac{1}{12}-\frac{5}{4}\)
\(\frac{2}{3}-x=-\frac{7}{6}\)
\(x=\frac{2}{3}-\left(-\frac{7}{6}\right)\)
\(x=\frac{2}{3}+\frac{7}{6}\)
\(x=\frac{11}{6}\)
X+1/3 = 3/ 4
X = 3/4 -1/3
X = 5/12
X - 2/5 = 5/7
X = 5/7 -2/5
X = 9/35
-X - 2/3 = 6/7
-X = 6/7 - 2/3
-X = 4/21
4/7 - X = 1/3
X = 4/7 - 1/3
X = 5/21
k mk nha bn!!!! thank bn nhìu nha
x + 1/3 = 3/4
x = 3/4 - 1/3
x = 5/12
x-2/4=5/7
x=5/7+2/5=
x=39/35
tườn tự nhé
giúp tớ nhé
tớ bị trừ 590 điểm
cảm ơn trước
Ta có: x-1/x-5 = 6/7
=>(x-1).7 = (x-5).6
=>7x-7 = 6x- 30
=> 7x-6x = 7-30
=> x = -23
Vậy x = -23
\(-\frac{4}{9}+\left(-\frac{5}{6}\right)-\frac{17}{4}=-\frac{199}{36}\)
\(-x-\frac{2}{3}=-\frac{6}{7}\)
\(\Rightarrow-x=-\frac{6}{7}+\frac{2}{3}\)
\(\Rightarrow-x=-\frac{4}{21}\)
\(\Rightarrow x=\frac{4}{21}\)
\(\frac{4}{7}-x=\frac{1}{3}\)
\(\Rightarrow x=\frac{4}{7}-\frac{1}{3}\)
\(\Rightarrow x=\frac{5}{21}\)
1. -4/9 + ( -5/6) -17/4
= -23/18 - 17/4 = -199/36
2.tìm x
a. -x - 2/3 = -6/7
-x = -6/7 +2/3
-x = -4/21
x=4/21
b. 4/7 - x = 1/3
x = 4/7 - 1/3
x =5/21
a)x=\(\frac{5}{12}\)
b)x=\(\frac{39}{35}\)
c)-x=-\(\frac{4}{21}\)
x=\(\frac{4}{21}\)
Sửa đề :
x-1/x-5=6/7
Ta có :
x-1/x-5 = 6/7
\(\Rightarrow\)( x - 1 ) . 7 = ( x - 5 ) . 6
\(\Rightarrow\)7x - 7 = 6x - 30
\(\Rightarrow\)7x - 6x = 7 - 30
\(\Rightarrow\)x = -23
Vậy x = -23
\(\frac{x-1}{x-5}=\frac{6}{7}\)
\(\frac{x-5+4}{x-5}=\frac{6}{7}\rightarrow1+\frac{4}{x-5}=\frac{6}{7}\rightarrow\frac{4}{x-5}=\frac{6}{7}-1=\frac{-1}{7}\)
\(\Rightarrow x-5=4\div\frac{-1}{7}=-28\rightarrow x=-23\)
Quá dễ luôn!
\(\frac{x-1}{x-5}\)=\(\frac{6}{7}\)
=> 7.(x-1)=6.(x-5)
=> 7x-7 = 6x-30
=> 7x-6x = -30 + 7
=> x = -23
\(\dfrac{x}{7}=\dfrac{5}{6}\Rightarrow x=\dfrac{7\cdot5}{6}=\dfrac{35}{6}\\ Vậy\text{ }x=\dfrac{35}{6}\)