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a: Ta có: \(\left(x+574\right)\cdot87=57246\)
\(\Leftrightarrow x+574=658\)
hay x=84
b: Ta có: 8x+17x=15675
nên 25x=15675
hay x=627
a: =>x+574=658
hay x=84
b: =>x:68=69
hay x=4692
c: =>18x=15667
hay x=15667/18
\(\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)\left(1-\frac{1}{4}\right).....\left(1-\frac{1}{100}\right).200x=4036\)
\(\Leftrightarrow\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.....\frac{99}{100}.200x=4036\)
\(\Leftrightarrow\frac{1.2.3...99}{2.3.4....100}.200x=4036\)
\(\Leftrightarrow\frac{1}{100}.200x=4036\)
\(\Leftrightarrow\frac{1}{100}.200x=4036\)
\(\Leftrightarrow2x=4036\)
\(\Leftrightarrow x=4036:2=2018\)
\(\left(1-\frac{1}{2}\right)\times\left(1-\frac{1}{3}\right)\times...\times\left(1-\frac{1}{100}\right)\times200\times x=4036\)
=> \(\frac{1}{2}\times\frac{2}{3}\times...\times\frac{99}{100}\times200\times x=4036\)
=> \(\frac{1\times2\times...\times99}{2\times3\times...\times100}\times200\times x=4036\)
\(\Rightarrow\frac{1}{100}\times200\times x=4036\)
\(\Rightarrow2\times x=4036\)
=> x = 2018
a) 5 × x + 3 × x =1096
x × ( 5 + 3 ) = 1096
x × 8 = 1096
x = 1096 :8
x = 137
b) 189 : x - 37 : x=8
( 189 - 37 ) : x = 8
152 : x = 8
x = 152 : 8
x = 19
ủng hộ nha
a , 5 X x + 3 X x = x X ( 5+3 ) = x X 8 = 1096
=> x = 1096 : 8 = 137.
b , 189 : x - 37 : x = ( 189-37 ) : x = 152 : x = 8
=> x = 152 : 8 = 19.
a/ (x . 3) : 4 = 57
=> x . 3 = 228
=> x = 76
b/ (9 . x) : 7 = 126
=> 9 . x = 882
=> x = 98
a) (x x 3) : 4 = 57
(x x 3) = 57 x 4
(x x 3) = 228
x = 228 : 3
x = 76
b) (9 x x) : 7 = 126
(9 x x) = 126 x 7
(9 x x) = 882
x = 882 : 9
x = 98
Cách giải
X = 8/9 / ( 1+1/3+1/6+1/10+1/15+1/21)
1+1/3=4/3
4/3+1/6=3/2
3/2+1/10=8/5
8/5+1/15=5/3
5/3+1/21=12/7
4/3+3/2=17/6
8/5+5/3=49/15
(17/6+49/15)+17/6=183/30+17/6=286/30
8/9:286/30=2288/270=1140/135=228/27=76/9
X = 76/9
a) ( x + 574 ) x 87 = 57246
x + 574 = 57246 : 87
x + 574 = 658
x = 658 - 574
x = 84
b) 8 x X + 17 x X = 15675
( 8 + 17 ) x X = 15675
25 x X = 15675
X = 15675 : 25
X = 627
^ - ^
a, (x+574) x 87 = 57246
x+574 = 57246 : 87
x+574 = 658
x = 658 - 574
x = 84
b, 8*x + 17*x = 15675
(8+17)*x = 15675
25*x = 15675
x = 15675 : 25
x = 627