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\(486:y-126:y=6\)
\(\Leftrightarrow\left(486-126\right):y=6\)
\(\Leftrightarrow360:y=6\)
\(\Leftrightarrow y=360:6\)
\(\Leftrightarrow y=60\)
Đáp số : 60
486 : y - 126 : y = 6
( 486 - 126 ) : y = 6
360 : y = 6
y = 360 : 6
y = 60
:D
a) 162 : 𝑥 + 216 : 𝑥 = 6
(162 + 216) : x = 6
378 : x = 6
x = 378 : 6
x = 63
b) 602 : x + 123 x 2 = 253
602 : x + 246 = 253
602 : x = 253 - 246
602 : x = 7
x = 602 : 7
x = 86
c) 486 : x - 126 :x = 6
(486-126) : x = 6
360 : x = 6
x = 360 : 6
x = 60
d) 725 : x + 175 : x = 5
(725 + 175) : x = 5
900 : x = 5
x = 900 : 5
x = 180
a)\(162:x+216:x=6\)
⇔\(\left(162+216\right):x=6\)
⇔\(378:x=6\)
⇔\(x=63\)
b)\(602:x+123.2=253\)
⇔\(602:x+246=253\)
⇔\(602:x=7\)
⇔\(x=86\)
c)\(486:x-126:x=6\)
⇔\(\left(486-126\right):x=6\)
⇔\(360:x=6\)
⇔\(x=60\)
d)\(725:x+175:x=5\)
⇔\(\left(725+175\right):x=5\)
⇔\(900:x=5\)
⇔\(x=180\)
\(a.162:x+216:x=6\) \(b.602:x+123x2=253\)
\(\left(162+216\right):x=6\) \(602:x+246=253\)
\(378:x=6\) \(602:x=253-246\)
\(x=378:6=63\) \(602:x=7\)
\(x=602:7=86\)
\(c.486:x-126:x=6\) \(d.725:x+175:x=5\)
\(\left(486-126\right):x=6\) \(\left(725+175\right):x=5\)
\(360:x=6\) \(900:x=5\)
\(x=360:6=60\) \(x=900:5=180\)
\(a,y\times27+y\times30+y\times44-y=10500\\\Rightarrow y\times\left(27+30+44-1\right)=10500\\ \Rightarrow y\times100=10500\\ \Rightarrow y=10500:100\\ \Rightarrow y=105\\ b,y\times285+115\times y=400\\ \Rightarrow y\times\left(285+115\right)=40\\ \Rightarrow y\times400=400\\ y=400:400\\ \Rightarrow y=1\)
\(a,\Rightarrow y\times\left(27+30+44-1\right)=10500\\ \Rightarrow y\times100=10500\\ \Rightarrow y=105\\ b,\Rightarrow y\times\left(285+115\right)=400\\ \Rightarrow y\times400=400\\ \Rightarrow y=1\)
Tìm y:
\(a,y+847\times2=1953-74\\ y+847\times2=1879\\ y+1694=1897\\ y=1897-1694\\ y=185\\ b,y:\left(7\times18\right)=5839+8591\\ y:126=14430\\ y=14430\times126\\ y=1818180.\)
\(y\times\frac{3}{5}+y\times\frac{2}{7}=\frac{31}{70}\)
\(\Leftrightarrow y\times\left(\frac{3}{5}+\frac{2}{7}\right)=\frac{31}{70}\)
\(\Leftrightarrow y\times\frac{31}{35}=\frac{31}{70}\)
\(\Leftrightarrow y=\frac{1}{2}\)
a) (y + 5) x 2020 = 205 x 2020
(y + 5) x 2020 = 414100
y + 5 = 414100 : 2020 = 205
y = 205 - 5 = 200
a) y= 200
b) y-45600 = 1600 × 4 ×25
y-45600=160000
y= 114400
a) 33 x y + 66 x y + y = 400
<=> y x ( 33 + 66 + 1 ) = 400
<=> y x 100 = 400
<=> y = 400 : 100 = 4
b) y x 836 + 164 x y = 42000
<=> y x ( 836 + 164 ) = 42000
<=> y x 1000 = 42000
<=> y = 42 000 : 1 000 = 42
a) 33 x y + 66 x y + y = 400
33 x y + 66 x y + y x 1 = 400
y x ( 33 + 66 + 1 ) = 400
y x 100 = 400
y = 400 : 100
y = 4
b) y x 836 + 164 x y = 42000
y x ( 836 + 264 ) = 42000
y x 1000 = 42000
y = 42000: 1000
y= 42
486 : y - 126 : y = 6
( 486 - 126 ) : y = 6
360 : y = 6
=> y = 360 : 6
y= 60
b, y x 70 = 42000 : 60
y x 70 = 700
y = 700 : 70
y = 10
a)
\(486:y-126:y=6\)
\(\left(486-126\right):y=6\)
\(360:y=6\)
\(y=360:6\)
Vậy \(y=60\)
b)
\(y\times70=42000:60\)
\(y=\frac{42000:60}{70}\)
Vậy \(y=10\)
nha