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\(\left(\frac{7}{2}+2x\right).\frac{8}{3}=\frac{16}{3}\)
\(\frac{7}{2}+2x=\frac{16}{3}:\frac{8}{3}\)
\(\frac{7}{2}+2x=2\)
\(2x=2-\frac{7}{2}\)
\(2x=\frac{-3}{2}\)
\(x=\frac{-3}{2}:2\)
\(x=\frac{-3}{4}\)
\(\frac{1}{3}.x+0,5x=0,75\)
\(\frac{1}{3}x+\frac{1}{2}x=\frac{3}{4}\)
\(x.\left(\frac{1}{3}+\frac{1}{2}\right)=\frac{3}{4}\)
\(x.\frac{5}{6}=\frac{3}{4}\)
\(x=\frac{3}{4}:\frac{5}{6}\)
\(x=\frac{9}{10}\)
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a)1/2:0,5-1/4:0,25+1/8:0,125-1/10:0,1
=1/2x2-1/4x4+1/8x8-1/10x10
=1-1+1-1
=0
b)không biết k 2 cái là dc rồi
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1 - [ 4/9 + x - 7/8 ] : 3/4 =0
1-[ 4/9 + x - 7/8 ] = 0 x 3/4 = 0
4/9 + x - 7/8 = 1-0 = 1
4/9 + x = 1+7/8 = 15/8
x = 15/8 - 4/9
x = 103/72 = 1 31/72
Vậy x = 1 131/72
mik ko chắc đúng đâu nha
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\(1\frac{1}{2}\times1\frac{1}{3}\times1\frac{1}{4}\times.....\times1\frac{1}{98}\times1\frac{1}{99}.\)
= \(\frac{3}{2}\times\frac{4}{3}\times\frac{5}{4}\times.....\times\frac{99}{98}\times\frac{100}{99}\)
= \(\frac{3\times4\times5\times....\times99\times100}{2\times3\times4\times.....\times98\times99}\)
= \(\frac{100}{2}\)
= \(50\)
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(2/3+1/2) x 9/4 : 2
= ( 4/6 + 3/6 ) x 9/4 x 1/2
= 7/6 x 9/4 x 1/2
= (7x9x1) / (6x4x2)
= 21/16
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1)
25 x 7 + 3 x (50-25) x (60 - 60)
=175 +3 x 25 x 0
=175
2)
\(\frac{1}{2}.\frac{3}{4}.\frac{4}{5}.\frac{1}{3}\\ =\frac{1.3.4.1}{2.4.5.3}\\ =\frac{3.4}{3.4.2.5}\\ =\frac{1}{2.5}\\ =\frac{1}{10}\)
Hãy tích cho tui đi
vì câu này dễ mặc dù tui ko biết làm
Yên tâm khi bạn tích cho tui
Tui sẽ ko tích lại bạn đâu
THANKS
\(\frac{x-1}{3}=\frac{1}{2}\)
\(\Leftrightarrow x-1=\frac{3}{2}\)
\(\Leftrightarrow x=\frac{3}{2}+1\)
\(\Leftrightarrow x=\frac{5}{2}\)