1.Tìm x biết:
71 + 65*4=x + 140 / x + 260
2.Tính
A = 6666666666 * 3333333333
Tìm x biết 71 + 65 nhân 4=x+140 / x+260
Tìm x, biết:
71+65*4=x+140:x+260
\(71+65.4=x+140:x+260\)
\(331=x+140:x+260\)
\(331-260=x+260:x\)
\(71=x+260:x\)
\(71-x=260:x\)
tới đây tui ko biết
71 + 65 x 4 = X + 140 / X + 260. tìm X
Tìm y biết 71 +65 x 4 = y +140 / y +260
Ta có: \(71+\left(65\times4\right)=\frac{y+140}{y+260}\)
\(\Leftrightarrow331=\frac{y+140}{y+260}\)
\(\Leftrightarrow331\left(y+260\right)=y+140\)
\(\Leftrightarrow331y+86060=y+140\)
\(\Leftrightarrow331y-y=140-86060\)
\(\Leftrightarrow330y=-85920\)
\(\Leftrightarrow y=\frac{-85920}{330}=\frac{-2864}{11}\)
tìm X
71 + 65 x 4 = X + 140 / X +260
hình như bn viết ngược
bài giải
x + 140/x + 260=331
x nhân 2 + 140 =331-260=71
x nhân 2 =71 : 140 =0,50
x= 0,50 : 2
x=0,25
hok tốt
\(71+65\) x 4 = \(\frac{x+140}{x+260}\)
=> 71 + 260 = \(\frac{x+140}{x+260}\)
=> \(331=\frac{x+140}{x+260}\)
=> \(331.\left(x+260\right)=x+140\)
=> \(331x+86060=x+140\)
=> \(331x-x=-86060+140\)
=>330x =- 85920
=> x = -2864/11
=> \(330x=-85920\)
Tìm x:
a) (X x 0,25 + 1999) x 2000 = ( 53 + 1999 ) x 2000
b) 71 + 65 x 4 = \(\dfrac{x+140}{x}\) + 260
\(a.\left(x\times0,25+1999\right)\times2000=2052\times2000\\ \left(x\times0,25+1999\right)\times2000=4104000\\ x\times0,25+1999=4104000:2000\\ x\times0,25+1999=2052\\ x\times0,25=2052-1999\\ x\times0,25=53\\ x=53:0,25\\ x=212\)
Tìm x
71 + 65 x 4 = \(\frac{x+140}{x}+260\)
#)Giải :
\(71+65.4=\frac{x+140}{x}+260\)
\(\frac{x+140}{x}+260=71+65.4\)
\(\frac{x+140}{x}+260=71+260\)
\(\frac{x+140}{x}=71\)
\(\frac{x}{x}+\frac{140}{x}=71\)
\(1+\frac{140}{x}=71\)
\(\frac{140}{x}=71-1\)
\(\frac{140}{x}=70\)
\(x=140:70\)
\(x=2\)
#~Will~be~Pens~#
\(71+65.4=\frac{x+140}{x}+260\)
\(\Rightarrow\frac{x+140}{x}+260=71+65.4\)
\(\frac{x+140}{x}+260=331\)
\(\frac{x+140}{x}=331-260=71\)
\(\frac{x}{x}+\frac{140}{x}=71\)
\(1+\frac{140}{x}=71\)
\(\frac{140}{x}=71-1=70\)
\(x=\frac{140}{70}=2\)
Vậy x=2
\(71+65\text{ x }4=\frac{x+140}{x}+260\)
\(\frac{x+140}{x}+260=71+65\text{ x }4\)
\(\frac{x+140}{x}+260=71+260\)
\(\frac{x+140}{x}=71\)
\(71x=x+140\)
\(71x-x=140\)
\(70x=140\)
\(x=140\text{ : }70\)
\(x=2\)
ài 1:71+65*4=x+140/x+260 , tìm x
bài 2:57,48*5+57,48*3+57,48+57,48,tính bằng cách thận tiện
71+65 x 4=x+140/x+260