x + 50 = 6 x 9
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\(\frac{27}{x}=\frac{9}{50}\)
\(\Rightarrow27\times50=9\times x\)
\(\Rightarrow1350=9\times x\)
\(\Rightarrow x=1350:9=150\)
~ Hok tốt ~
\(\frac{2+3}{5+x}=\frac{5}{6}\)
\(\Rightarrow\left(5+x\right)\times5=\left(2+3\right)\times6\)
\(\Rightarrow\left(5+x\right)\times5=5\times6\)
\(\Rightarrow\left(5+x\right)\times5=30\)
\(\Rightarrow\left(5+x\right)=30:5\)
\(\Rightarrow\left(5+x\right)=6\)
\(\Rightarrow x=6-5\)
\(\Rightarrow x=1\)
\(9\cdot\left(x-6\right)=-50+-4\)
\(9\cdot\left(x-6\right)=-\left(50+4\right)\)
\(9\cdot\left(x-6\right)=-54\)
\(\left(x-6\right)=-54:9\)
\(\left(x-6\right)=-6\)
\(x=-6+6=0\)
Chúc bạn học tốt!!!
a, x50 = x
=> x = 0 hoặc x=1
b, (x-6)2 = 9 = 32 = (-3)2
TH1: (x-6)2 = 32
=> x - 6 = 3
=> x = 3+6
=> x = 9
TH2: (x-6)2 = (-3)2
=> x - 6 = -3
=> x = -3 + 6
=> x = 3
100 x 6 x 9 x 50 x 200 x 900 x 1000 x 2000 x 900 x 10 = 874800000000000000000
a) \(\frac{18}{45}-\frac{4}{12}-\frac{6}{9}-\frac{21}{35}=\frac{2}{5}-\frac{1}{3}-\frac{2}{3}-\frac{3}{5}\)
\(=\left(\frac{2}{5}-\frac{3}{5}\right)-\left(\frac{1}{3}+\frac{2}{3}\right)\)
\(=\frac{-1}{3}-1\)
\(=\frac{-4}{3}\)
b) \(\frac{4}{3}+\frac{3}{5}+\frac{7}{3}+\frac{2}{5}+\frac{1}{3}=\left(\frac{4}{3}+\frac{7}{3}+\frac{1}{3}\right)+\left(\frac{3}{5}+\frac{2}{5}\right)\)
\(=4+1=5\)
c) \(\frac{1}{3}.\frac{4}{5}.\frac{1}{3}.\frac{6}{5}=\frac{8}{75}\)
d) \(\frac{6}{7}.\frac{8}{13}+\frac{6}{7}.\frac{9}{13}-\frac{3}{13}.\frac{6}{7}\)
\(=\frac{6}{7}.\left(\frac{8}{13}+\frac{9}{13}-\frac{3}{13}\right)\)
\(=\frac{6}{7}.\frac{14}{13}\)
\(=\frac{12}{13}\)
a)
= 25 x 4 x 7 x 9
= 100 x 63
= 6300
b)
= 2 x 50 x 47 x 10
= 100 x 470
= 47000
c)
= 20 x 5 x 9 x 6
= 100 x 54
= 5400
x+50=6.9
x+50=54
x=54-50
x=4
k mk nhe
x + 50 = 6 x 9
x + 50 = 54
x = 54 - 50
x = 4
tk mk mk tk lại