71+65*4 =y+140/y+260
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 y :
a/ y + y : 3 x 4.5 + y : 2 x 76 = 24
b / 71 + 65 x 4 = y + 140 : y + 260
71+65×4=(x+140)÷x+260
71+65 x 4=x+140/x+260
71 + 65 x 4 = x + 140/x + 260
\(\frac{x+140}{x}\)phân tích ra thành \(\frac{x}{x}+\frac{140}{x}\)đó Ngọc Nguyễn Minh
71 + 65 x 4 = x + 140 / x + 260.
x=400x331
x=132400
tích nha!mk tích bn rùi đó
71+260=x/(140+260)
331=x/400
x=400x331=132400
71 + 65 x 4 = x +140 :x + 260
331=x+140:x+260
331=x: [140+260]
331=x:400
x=331 nhân 400
x=132 400
hok tốt
x = 2
* Cách giải lên lớp 6 học *
\(71+65\times4=\frac{x+140}{x}+260\)
\(\Leftrightarrow331=\frac{x+140}{x}+260\)
\(\Leftrightarrow71=\frac{x+140}{x}\)
\(\Leftrightarrow x+140=71.x\)
\(\Leftrightarrow140=71.x-x\)
\(\Leftrightarrow140=x\left(71-1\right)\)
\(\Leftrightarrow140=x70\)
\(\Leftrightarrow x=140:70=2\)
71+65 nhân 4 =x+140/x+260
tim x biet : 71+65*4= ( x +140 / x+260)