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a) 14,29 - x = 88,24 : 8
14,29 - x = 11,03
x = 14,29 - 11,03
x = 3,26
b) x : 2,4 = 3,8 + 0,45
x : 2,4 = 4,25
x = 4,25 x 2,4
x = 10,2
a) \(\frac{3}{5}+\frac{6}{11}+\frac{7}{13}+\frac{5}{11}+\frac{2}{5}+\frac{19}{13}=\left(\frac{3}{5}+\frac{2}{5}\right)+\left(\frac{6}{11}+\frac{5}{11}\right)+\left(\frac{7}{13}+\frac{19}{13}\right)=1+1+2=4\)
b) \(\frac{6}{5}\times\frac{3}{8}+\frac{5}{8}\times\frac{6}{5}-\frac{4}{5}=\frac{6}{5}\times\left(\frac{3}{8}+\frac{5}{8}\right)-\frac{4}{5}=\frac{6}{5}-\frac{4}{5}=\frac{2}{5}\)
c) \(\frac{4\times5\times6\times7\times8}{8\times10\times12\times14\times16}=\frac{1}{2\times2\times2\times2\times2}=\frac{1}{32}\)
a, \(\frac{3}{5}+\frac{6}{11}+\frac{7}{13}+\frac{6}{11}+\frac{2}{5}+\frac{19}{13}\)
\(=\left(\frac{3}{5}+\frac{2}{5}\right)+\left(\frac{7}{13}+\frac{19}{13}\right)+\left(\frac{6}{11}+\frac{6}{11}\right)\)
\(=1+2+\frac{12}{11}\)
\(=3+\frac{12}{11}\)
\(=\frac{45}{11}\)
(8 x 18 - 5 x 18 - 18 x 3)x + 2x = 8 x 7 + 24
<=> [18 x (8 - 5 - 3)]x + 2x = 80
<=> 2x = 80
<=> x = 40,k nhé bạn
(8x18-5x18-18x3)xX+2xX=8x7+24
=>8x(8-5-3)xX+2xX=80
=>8x0xX+2xX=80
=>0+2xX=80
=>X=80:2
=>X=40
x=\(\frac{4}{3}\)-\(\frac{3}{8}\)=\(\frac{23}{24}\)
x = \(\frac{4}{5}\)+ \(\frac{7}{6}\)=\(\frac{59}{30}\)
x = \(\frac{21}{8}\): \(\frac{1}{9}\) = \(\frac{189}{8}\)
x = \(\frac{8}{3}\)* 5 = \(\frac{40}{3}\)
chúc bạn học tốt ☻
\(\frac{7}{8}:\left(x+1\right)=\frac{8}{7}\)
\(x+1=\frac{8}{7}\times\frac{7}{8}\)
\(x+1=1\)
\(x=1-1=0\)
Vậy x = 0 nha bn
\(\frac{7}{8}\):( X+ 1)= \(\frac{8}{7}\).
X+ 1= \(\frac{7}{8}\): \(\frac{8}{7}\).
X+ 1= \(\frac{49}{64}\).
X= \(\frac{49}{64}\)- 1.
X= -\(\frac{15}{64}\).
=>14,29-x=11,03
hay x=3,26
\(\left(14,29-x\right)\times8=88,24\)
\(14,29-x=88,24:8=11,03\)
\(x=14,29-11,03=3,26\)