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3885 : ( y x 21 ) = 37
y x 21 = 3885 : 37
y x 21 = 105
y = 105 : 21
y = 5
a ) 3885 / ( x * 21 ) = 37
x * 21 = 3885 : 37
x * 21 = 105
x = 105 : 21
x = 5
b ) 50343 : x = 405 ( dư 123 )
x = ( 50343 - 123 ) : 405
x = 50220 : 405
x = 124
c ) 3257 + 25286 : x = 3304
25286 : x = 3304 - 3257
25286 : x = 47
x = 25286 : 47
x = 538
a ) 3885 / ( x * 21 ) = 37
x * 21 = 3885 : 37
x * 21 = 105
x = 105 : 21
x = 5
b ) 50343 : x = 405 ( dư 123 )
x = ( 50343 - 123 ) : 405
x = 50220 : 405
x = 124
c ) 3257 + 25286 : x = 3304
25286 : x = 3304 - 3257
25286 : x = 47
x = 25286 : 47
x = 538
@_@ k mình nha
162:x + 216:x = 6
(162 + 216):x = 6
378:x = 6
x = 378 : 6
x= 63
a: =>21y=105
hay y=5
b: =>50343=405x+123
=>405x=50220
hay x=124
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) 3885:(\(x\) x 21) =37.
(\(x\) x 21) = 3885 : 37
(\(x\) x 21) = 105
\(x\) = 105 : 21
\(x\) = 5.
Vậy \(x\) =5.
b) 162:x+216:x=6
(162 + 216) : x =6
378 : x = 6
x = 378 : 6
x = 63.
Vậy x = 63.
# HOK TỐT #
a) 3885:(X * 21) =37 b) 162:x+216:x=6
x . 21 = 3885 : 37 (162+216):x=6
x . 21 = 105 378:x=6
x= 105: 21 x = 378:6
x = 5 x = 63