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\(18,2:x=1,4\times4\)
\(\Rightarrow18,2:x=5,6\)
\(\Rightarrow x=3,25\)
\(\frac{3}{5}\times x=\frac{2}{3}-\frac{2}{7}\)
\(\Rightarrow\frac{3}{5}\times x=\frac{8}{21}\)
\(\Rightarrow x=\frac{40}{63}\)
tíc nha
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32,4 x 2,8 + 1,4 x 35,5 + 32,1 x 1,4
= 32,4 x ( 1,4 x 2 ) + 1,4 x 35,5 + 32,1 x 1,4
= 32,4 x 1,4 + 1,4 x 35,5 + 32,1 x 1,4 x 2
= 1,4 x ( 32,4 + 35,5 + 32,1 ) x 2
= 1,4 x 100 x2
= 140 x 2
= 280
Nếu đúng thì k cho mình nha !
32,4.(1,4.2)+1,4.35,5+32,1.1,4
=32,4.2.1,4+1,4.35,5+32,1.1,4
=64,8.1,4+1,4.35,5+32,1.1,4
=1,4.(64,8+35,5+32,1)
=1,4.132,4
=185,36
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1,4 x 15/49 + 4/5 + 2/3 : 21/5
= 3/7 + 4/5 + 10/63
= 3/7 + 10/63 + 4/5
= 37/63 + 4/5
= 437/315
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a: =12h-7h=5h
b: =1,4h*1+1,4h+1,4h*8
=1.4h*10
=14h
c: =1,25h+1,25h+1,25h*8
=1,25h*10=12,5h
5,6=x-5,56
x=5,6+5,56=11,16
\(\Rightarrow5,6=x-5,56\\ \Rightarrow x-5,56=5,6\\ \Rightarrow x=5,6+5,56\\ \Rightarrow x=11,16\)