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=> x.13/4 + -7/6. x - 5/3 = 5/12
=> x. (13/4 + -7/6 - 5/3) = 5/12
=> x. 5/12 = 5/12
=> x = 5/12:5/12
=> x = 5/12.12/5
=> x = 1
Tìm x :
x - 0,27 = \(\frac{73}{100}\)
x = \(\frac{73}{100}+0,27\)
x = 1
Cậu P khó quá mik chưa nghĩ ra cách tính nhanh nhất !
Cậu tự giải nhé !
Hok tốt
\(x-40\%x=3,6\)
\(\Rightarrow100\%x-40\%x=3,6\)
\(\Rightarrow60\%x=3,6\)
\(\Rightarrow\frac{60}{100}x=3,6\)
\(\Rightarrow x=6\)
\(3\frac{2}{7}x-\frac{1}{3}=-2\frac{3}{4}\)
\(\Rightarrow\frac{23}{7}x-\frac{1}{3}=-\frac{11}{4}\)
\(\Rightarrow\frac{23}{7}x=-\frac{33}{12}+\frac{4}{12}\)
\(\Rightarrow\frac{23}{7}x=\frac{29}{12}\)
\(\Rightarrow x=\frac{29}{12}:\frac{23}{7}=\frac{203}{276}\)
Bài 2:
a: =>x/7=1/21
=>x=1/3
c: =>x(3x-2)=0
=>x=0 hoặc x=2/3
Bài1:
a: \(=\left(-\dfrac{7}{3}\right)^{3-2}=\dfrac{-7}{3}\)
b: \(=\left(-\dfrac{4}{9}\right)^{1-3}=\left(-\dfrac{4}{9}\right)^{-2}=\dfrac{81}{16}\)
c: \(=\left(\dfrac{1}{5}\right)^{10-7}=\left(\dfrac{1}{5}\right)^3=\dfrac{1}{125}\)
a) \(x+\frac{1}{6}=-\frac{3}{8}\)
\(x=-\frac{3}{8}-\frac{1}{6}\)
\(x=-\frac{13}{24}\)
~ Thiên mã ~
b) \(\frac{1}{2}.x+\frac{1}{8}.x=\frac{3}{4}\)
\(x.\left(\frac{1}{2}+\frac{1}{8}\right)=\frac{3}{4}\)
\(\frac{5}{8}.x=\frac{3}{4}\)
\(x=\frac{6}{5}\)
~ Thiên Mã ~
a) \(\frac{\left(5.2\right)}{3.2}-\frac{1}{2}x+\frac{1}{3}+\frac{1}{5}=\frac{\left(3.2\right)}{5}\)
\(\Leftrightarrow\)\(\frac{1}{2}-\frac{1}{2}x+\frac{8}{15}=\frac{6}{5}\)
\(\Leftrightarrow\)\(\frac{1}{2}-\frac{2}{3}=\frac{1}{2}x\)
\(\Leftrightarrow\)\(-\frac{1}{6}=\frac{1}{2}x\)
\(\Leftrightarrow\)x=-1/3
b) VT= \(\frac{\left(3.5.4.2\right)}{5.2.3}=4\)
\(\Leftrightarrow\left(x-\frac{1}{2}\right):6+4=4:\frac{2}{3}=6\)
\(\Leftrightarrow\left(x-\frac{1}{2}\right):6=2\)
\(\Leftrightarrow x-\frac{1}{2}=12\)
=> x= 12,5
3/(x-5) = -4/(x+2)
=> 3(x + 2) = -4(x - 5)
=> 3x + 6 = -4x + 20
=> 3x + 4x = 20 - 6
=> 7x = 14
=> x = 2
Câu hỏi của Bé Lựu Cute - Toán lớp 6 - Học toán với OnlineMath
\(\left(3,25-\frac{2}{3}x\right):\left(\frac{-7}{4}\right)=-3\)
\(\left(\frac{14}{3}-\frac{2}{3}x\right):\left(\frac{-7}{4}\right)=-3\)
\(\frac{14}{3}-\frac{2}{3}x=\left(-3\right).\left(\frac{-7}{4}\right)\)
\(\frac{14}{3}-\frac{2}{3}x=\frac{21}{4}\)
\(-\frac{2}{3}x=\frac{21}{4}-\frac{14}{3}\)
\(-\frac{2}{3}x=\frac{7}{12}\)
\(x=\frac{7}{12}:\left(-\frac{2}{3}\right)\)
\(x=-\frac{7}{8}\)
\(PT\Leftrightarrow3,25-\frac{2}{3}x=\left(-3\right).\left(\frac{-7}{4}\right)\)
\(\Leftrightarrow3,25-\frac{2}{3}x=\frac{21}{4}\)
\(\Leftrightarrow\frac{2}{3}x=3,25-\frac{21}{4}\)
\(\Leftrightarrow\frac{2}{3}x=-2\)
\(\Leftrightarrow x=\left(-2\right).\frac{3}{2}\)
\(\Leftrightarrow x=-3\)