tìm x nhé caccau
2(x-1/2)-5(x+3/5)=-x+1/-3
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a, (ko vt lại đề)
=> -5x- 1-1/2x -1/3=3/2x -5/6
=> -5x - 1/2x +3/2x = 1+1/3 - 5/6
=>( -5 -1/2 + 3/2 )x =1/2
=> -4x = 1/2
=> x = -1/8
Ta có: 3.(x-\(\frac{1}{2}\))-5(x+\(\frac{3}{5}\))=-x+\(\frac{3}{5}\)
\(\Leftrightarrow\)3x-\(\frac{3}{2}\)-5x-3=-x+\(\frac{3}{5}\)
\(\Leftrightarrow\)8x-\(\frac{9}{2}\)=-x+\(\frac{3}{5}\)
\(\Leftrightarrow\)9x=\(\frac{51}{10}\)
\(\Leftrightarrow\)x=\(\frac{17}{30}\)
Vậy x=\(\frac{17}{30}\)
3(x - 1/2) - 5(x + 3/5) = -x + 3/5
3x - 3/2 - 5x - 3 = 3/5 - x
-2x - 9/2 = 3/5 - x
-9/2 = 3/5 - x + 2x
-9/2 = 3/2 + x
-9/2 - 3/5 = x
-51/10 = x
=> x = -51/10
\(a,\frac{1}{3}+\frac{1}{2}:x=\frac{1}{5}\)
\(\Leftrightarrow\frac{1}{2}:x=\frac{1}{5}-\frac{1}{3}\)
\(\Leftrightarrow\frac{1}{2}:x=\frac{3}{15}-\frac{5}{15}\)
\(\Leftrightarrow\frac{1}{2}:x=\frac{-2}{15}\)
\(\Leftrightarrow x=\frac{1}{2}:\frac{-15}{2}=\frac{-15}{4}\)
\(b,\frac{1}{3}x+\frac{2}{5}\left[x+1\right]=0\)
\(\Leftrightarrow\frac{1}{3}x+\frac{2}{5}x+\frac{2}{5}=0\)
\(\Leftrightarrow\frac{11}{15}x=-\frac{2}{5}\Leftrightarrow x=\frac{-2}{5}:\frac{11}{15}=\frac{-2}{5}\cdot\frac{15}{11}=\frac{-2}{1}\cdot\frac{3}{11}=\frac{-6}{11}\)
\(a,-12\left(x-5\right)+7\left(3-x\right)=5\)
\(-12x+60+21-7x=5\)
\(-12x-7x+81=5\)
\(-19x=5-81\)
\(-19x=-76\)
\(x=-76:\left(-19\right)\)
\(x=4\)
\(Vậyx=4\)
\(b,30\left(x+2\right)-6\left(x-5\right)-24x=100\)
\(30x+60-6x-30-24x=100\)
\(30x-6x-24x+60-30=100\)
\(0x+30=100\)
\(\Rightarrow Vôlý\)
Vậy không có giá trị nào của x thỏa mãn đề bài.
\(c,-5\left(x+\frac{1}{5}\right)-\frac{1}{2}\left(x-\frac{2}{3}\right)=\frac{3}{2}x-\frac{5}{6}\)
\(-5x-1-\frac{1}{2}x-\frac{1}{3}=\frac{3}{2}x-\frac{5}{6}\)
\(-5x-\frac{1}{2}x-1-\frac{1}{3}=\frac{3}{2}x-\frac{5}{6}\)
\(-\frac{11}{2}x-\frac{2}{3}=\frac{3}{2}x-\frac{5}{6}\)
\(-\frac{2}{3}+\frac{5}{6}=\frac{3}{2}x+\frac{11}{2}x\)
\(-\frac{4}{6}+\frac{5}{6}=\frac{14}{2}x\)
\(\frac{1}{6}=7x\)
\(x=\frac{1}{6}:7\)
\(x=\frac{1}{6}.\frac{1}{7}\)
\(x=\frac{1}{42}\)
\(Vậyx=\frac{1}{42}\)
\(d,-3\left(x-\frac{1}{2}\right)-5\left(x+\frac{3}{5}\right)=-x+\frac{1}{5}\)
\(-3x+\frac{3}{2}-5x-3=-x+\frac{1}{5}\)
\(-3x-5x+\frac{3}{2}-3=-x+\frac{1}{5}\)
\(-8x+\frac{3}{2}-\frac{6}{2}=-x+\frac{1}{5}\)
\(-8x-\frac{3}{2}=-x+\frac{1}{5}\)
\(-\frac{3}{2}-\frac{1}{5}=-x+8x\)
\(\frac{15}{10}-\frac{2}{10}=7x\)
\(7x=\frac{13}{10}\)
\(x=\frac{13}{10}:7\)
\(x=\frac{13}{10}.\frac{1}{7}\)
\(x=\frac{13}{70}\)
\(Vậyx=\frac{13}{70}\)
X x \(\dfrac{3}{4}\)+ X x\(\dfrac{1}{5}\)+ X x \(\dfrac{1}{20}\)+ X= 1000
\(x-\frac{1}{4}=\frac{5}{3}\)
\(\Rightarrow x=\frac{23}{12}\)
\(x:\frac{5}{11}=22\)
\(\Rightarrow x=10\)
\(\frac{2}{4}+x=1\)
\(\Rightarrow x=\frac{1}{2}\)
\(x-\frac{11}{5}=\frac{2}{5}:\frac{2}{3}\)
\(\Rightarrow x-\frac{11}{5}=\frac{3}{5}\)
\(\Rightarrow x=\frac{18}{5}\)
\(a)x-\frac{1}{4}=\frac{5}{3}\)
\(\Rightarrow x=\frac{5}{3}+\frac{1}{4}=\frac{23}{12}\)
\(b)x:\frac{5}{11}=22\)
\(\Rightarrow x=22.\frac{5}{11}=10\)
\(c)\frac{2}{4}+x=1\)
\(x=1-\frac{2}{4}=\frac{1}{2}\)
\(d)x-\frac{11}{5}=\frac{2}{5}:\frac{2}{3}\)
\(\Rightarrow x-\frac{11}{5}=\frac{3}{5}\)
\(\Rightarrow x=\frac{3}{5}+\frac{11}{5}=\frac{14}{5}\)
giúp mình đê caccau