1 .tìm x biết :
92.4 - 27 = ( x + 350 ) : x + 315
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Lời giải là
92.4−27=a+350a+315
368−27=a+350a+315
341=a+350a+315
a+350a=341−315
a+350a=26
a+350=26.a
26.a−a=350
(26−1).a=350
25.a=350
a=350:25
a=14.
\(92.4-27=\frac{x+350}{x}+315\)
\(< =>368-27=\frac{x+350}{x}+315\)
\(< =>341=\frac{x+350}{x}+315\)
\(\frac{x+350}{x}=341-315\)
\(\frac{x+350}{x}=26\)
\(\left(x+350\right):x=26\)
\(x+350=x.26\)
\(350=x.25\)
\(x=350:25\)
\(x=14.\)
Đáp số : 14.
92.4 - 27 = ( x+ 350) / x +315
hay 341 = (x+ 350) / x +315
=> 26 = (x+ 350) / x
=> 26x = x + 350
=> 25x = 350
=> x= 14
KUDO SHINICHI:
Bài làm:
\(92.4-27=x+\frac{350}{x}+315\)
\(368-27=x+\frac{350}{x}+315\)
\(341=\frac{x}{350+315}\Leftrightarrow341=x:350+315\)
\(341=x:665\)
\(x=665.341\)
\(\rightarrow x=226765\)
Vậy x=226765
:3, Chúc bạn học tốt!!
92.4-27=x+350/x +315
368 - 27 = x+350 : x + 315
341 = x : (350 + 315)
341 = x : 665
x = 665 x 341
x = 226765
92.4-27=(x+350) : x + 315
368-27=x : x + 350 : x + 315
341=1+350 : x +315
341-315-1=350 : x
25=350 : x
350 : 25=x
14=x
vậy x=14
a) 53( 3x + 2 ) : 13 = 103 : ( 135 : 134 )
=> 53( 3x + 2 ) : 13 = 103 : 13
=> 53( 3x + 2 ) = 103 : 13 : 13
=> 53( 3x + 2 ) = 103
=> 3x + 2 = 23
=> 3x + 2 = 8
=> 3x = 6
=> x = 2
\(697:\frac{15x+364}{x}=17\)
\(\frac{15x+364}{x}=697:17=41\)
\(\frac{15x}{x}+\frac{364}{x}=41\)
\(15+\frac{364}{x}=41\)
\(\frac{364}{x}=41-15=26\)
\(x=364:26=14\)
\(92.4-27=\frac{x+350}{x}+315\)
\(\frac{x+350}{x}+315=341\)
\(\frac{x+350}{x}=341-315=26\)
\(\frac{x}{x}+\frac{350}{x}=26\)
\(1+\frac{350}{x}=26\)
\(\frac{350}{x}=26-1=25\)
\(x=350:25=14\)
\(92.4-27=\left(x+350\right):x+315\)
\(\Leftrightarrow368-27=\left(x+350\right):x+315\)
\(\Leftrightarrow341=\left(x+350\right):x+315\)
\(\Leftrightarrow\left(x+350\right):x=341-315\)
\(\Leftrightarrow\left(x+350\right):x=26\)
\(\Leftrightarrow\left(x:x\right)+\left(350:x\right)=26\)
\(\Leftrightarrow1+350:x=26\)
\(\Leftrightarrow350:x=26-1\)
\(\Leftrightarrow350:x=25\)
\(\Leftrightarrow x=\dfrac{350}{25}=14\)
Vậy x=14
mơn nhoa Nam !!!