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\(1692,8:x=92\)
\(x=\frac{1692,8}{92}\)
\(x=18,4\)
vậy \(x=18,4\)
\(1087,5:x=87\)
\(x=\frac{1087,5}{87}\)
\(x=12,5\)
vậy \(x=12,5\)
Vũ Quế Anh Học giỏi
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\(\frac{58x63}{42x87}=\frac{2x29x7x9}{6x7x3x29}=\frac{2x7x9x29}{2x7x3x3x29}=1\)
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87-(321-x):5=75
=>87-(321-x) =75 x 5
=> 87-(321-x)= 375
=> 321-x=87-375
=> 321-x=.............
=> x=321- .........
tíc mình nha
87-(321-x)=75x5
87-321-xx=375
321-xx=375-87
321-xx=287
x = 321-287
x=34
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x : 4 = 675
x = 675 * 4
x = 2700
x : 3 = 27
x= 27 * 3
x = 81
x * 2 = 7890
x = 7890 : 2
x = 3945
x : 4 = 675
=> x = 675 x 4 = 2700
x : 3 = 87
=> x = 87 x 3 = 261
x * 2 = 7890
=> x = 7890 : 2 = 3945
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2 x 53 x 12 + 4 x 6 x 87 - 3 x 8 x 40
= 24 x 53 + 24 x 87 - 24 x 40
= 24 x ( 53 + 87 - 40 )
= 24 x 100
= 2400
2 x 53 x 12 + 4 x 6 x 87 - 3 x 8 x 40
= ( 2 x 12 ) x 53 + ( 4 x 6 ) x 87 - ( 3 x 8 ) x 40
= 24 x 53 + 24 x 87 - 24 x 40
= 24 x ( 53 + 87 - 40 )
= 24 x 100
= 2400
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12 x 6 x 9 x 87 x 6 = 338256
k cho mình nhé! Mình đang bị âm 17 điểm
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432/45 + 14.7 = 24.3
823.2 / 8.4 - 98 = 0
(754.4 + 333.1 ) / 12.5 = 87
\(\frac{432}{45}+x=24,3\)
\(\Leftrightarrow9,6+x=24,3\)
\(\Leftrightarrow x=24,3-9,6=14,7\)
\(823,2:84-x=0\)
\(\Leftrightarrow98-x=0\Leftrightarrow x=98\)
\(\frac{754,4+333,1}{x}=87\)
\(\Leftrightarrow754,4+333,1=87x\)
\(\Leftrightarrow1087,5=87x\)
\(\Rightarrow x=1087,5:87=12,5\)
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X=(1800+600):30):560:(315:35)
X=(2400:30):560:9
X=80:560:9
X=80x1/560x1/9
X=1/7x1/9
X=1/63
A=58x72+63x81-58x52-63x61
= (58x72-58x52)+(63x81-63x61)
= 58(72-52)+63(81-61)
= 58x20+63x20
= 1160+1260
= 2420