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умничка20054
@умничка20054
December 2021
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помогите пожалуйста немогу решить
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TARTILLO
Verified answer
1) 1/x+1/[(1цел 2/3)·x]=2/5
1/x+1/[(5/3)·x]=2/5⇔1/x+3/[5·x]=2/5 ⇔ 5/x+3/x=2 ⇔8/x=2 ⇔x=4
D
2)2/(1цел 3/5)·x]+1/x=3/4
2/(8x/5)+1/x=3/4 ⇔ 5/(4x)+1/x=3/4
5/x+4/x=3 ⇔ 9/x=3⇔ x=3
C
3) 2/ [(1цел 1/3)x]-1/x=1/4
2/(4x/3)-1/x=1/4⇔3/(2x)-2/(2x)=1/4 ⇔1/(2x)=1/4 ⇔x=2
A
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Answers & Comments
Verified answer
1) 1/x+1/[(1цел 2/3)·x]=2/51/x+1/[(5/3)·x]=2/5⇔1/x+3/[5·x]=2/5 ⇔ 5/x+3/x=2 ⇔8/x=2 ⇔x=4
D
2)2/(1цел 3/5)·x]+1/x=3/4
2/(8x/5)+1/x=3/4 ⇔ 5/(4x)+1/x=3/4
5/x+4/x=3 ⇔ 9/x=3⇔ x=3
C
3) 2/ [(1цел 1/3)x]-1/x=1/4
2/(4x/3)-1/x=1/4⇔3/(2x)-2/(2x)=1/4 ⇔1/(2x)=1/4 ⇔x=2
A