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1-\(\left(3\frac{3}{8}+x-2\frac{5}{24}\right)\)\(.\frac{12}{17}=0\)
\(\Rightarrow\left(3\frac{3}{8}+x-2\frac{5}{24}\right)\)\(.\frac{12}{17}\)\(=1\)
\(\frac{27}{8}+x-\frac{53}{24}\) \(=1:\frac{12}{17}\)
\(\frac{27}{8}+x=\frac{17}{12}+\frac{53}{24}\)
\(\frac{27}{8}+x=\frac{34+53}{24}\)
\(\frac{27}{8}+x=\frac{87}{24}\)
\(x=\frac{87}{24}-\frac{27}{8}\)
\(x=\frac{87-81}{24}\)
\(x=\frac{6}{24}=\frac{1}{4}\)
a) \(x\cdot\frac{1}{2}+x\cdot\frac{1}{4}+x\cdot\frac{1}{8}=\frac{21}{24}\)
\(x\cdot\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\right)=\frac{7}{8}\)
\(x\cdot\frac{7}{8}=\frac{7}{8}\)
\(\Rightarrow x=\frac{7}{8}\div\frac{7}{8}=1\)
b) \(\left(x+4\right)+\left(x+9\right)+\left(x+14\right)+.....+\left(x+44\right)+\left(x+49\right)=1430\)
\(\left(x+x+x+....+x+x\right)+\left(4+9+14+...+44+49\right)=1430\)
\(10x+265=1430\)
\(10x=1430-265\)
\(10x=1165\)
\(\Rightarrow x=\frac{1165}{10}=116,5\)
c) \(x\cdot0,25-0,5=1\)
\(x\cdot0,25=1+0,5\)
\(x\cdot0,25=1,5\)
\(\Rightarrow x=1,5\div0,25=6\)
\(x+3\frac{1}{2}+x=24\frac{1}{4}\\ x+x+\frac{7}{2}=\frac{97}{4}\\ x+x=\frac{97}{4}-\frac{7}{2}\\ x+x=\frac{97}{4}-\frac{14}{4}\)
\(x+x=\frac{83}{4}\\ x=\sqrt{\frac{83}{4}}\)
x + 3/1/2 + x = 24/1/4
2x + 3/1/2 = 24/1/4
2x = 24/1/4 - 3/1/2
2x = 20/3/4
x = 20/3/4 : 2
x = 10/3/8 ( Cách 1 )
x + 3/1/2 + x = 24/1/4
= x + 3,5 + x = 24,25
2x + 3,5 = 24,25
2x = 24,25 - 3,5
2x = 20,75
x = 20,75 : 2
x = 10,375
= 10375/1000
x = 10/3/8 ( Cách 2 )
Bạn có thể chọn 1 trong 2 cách trên
Chúc bạn học tốt !
\(x+1\frac{1}{2}=\frac{3}{2}+\frac{1}{2}\)
\(x+1\frac{1}{2}=2\)
\(x=2-1\frac{1}{2}\)
\(x=\frac{1}{2}\)
what the hell