x * 3 * 5 = 2,7
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a: \(x\cdot3\cdot5=2,7\)
=>\(x\cdot15=2,7\)
=>\(x=\dfrac{2,7}{15}=0,18\)
b: \(1,2:x\cdot4=20\)
=>\(1,2:x=20:4=5\)
=>\(x=1,2:5=0,24\)
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(2,7+1,8)*2*1,5=4,5*2*1,5 =9*1,5 =13,5 (6/5*3/4)*2*2/3=9/10*2*2/3 =9/5*2/3 =6/5 2,7*1,8*1,5=7,29 6/5*3/4*2/3=3/5 16*16*6=1536
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b: \(\Leftrightarrow3x-36-5x-175+x-15=0\)
\(\Leftrightarrow-x-226=0\)
hay x=-226
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a: \(x\cdot3\cdot5=2,7\)
=>\(x\cdot15=2,7\)
=>\(x=2,7:15=0,18\)
b: \(1,2:x\cdot4=20\)
=>\(1,2:x=20:4=5\)
=>\(x=1,2:5=0,24\)
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( 32 ,5 + 28 ,3 x 2,7 - 108 ,91 ) x 2006
= ( 32,5+76,41-108,91) x 2006
= ( 108,91-108,91) x 2006
= 0x2006
=0
Vậy: ( 32 ,5 + 28 ,3 x 2,7 - 108 ,91 ) x 2006 = 0
(32,5+28,3x2,7-108,91)x2006
=(32,5+76,41-108,91)x2006
=( 108,91-108,91 )x2006
=0x2006
=0
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\(\left(2,7+1,8\right).2.1,5=13,5\)
\(\left(\frac{6}{5}.\frac{3}{4}\right).2.\frac{2}{3}=1,2\)
\(2,7.1,8.1,5=7,29\)
\(\frac{6}{5}.\frac{3}{4}.\frac{2}{3}=0,6\)
\(16.16.6=1536\)
= 13,5.
= \(\frac{6}{5}\).
= 7,29.
= \(\frac{3}{5}\).
= 1536.
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a: =>x+1/5-27/10=11/2
=>x-5/2=11/2
hay x=8
b: =>11/4+x-7/8=6
=>15/8+x=6
hay x=33/8
x=27:5:3=1,8
x=27:5:3
x=5,4:3
x=1,8