tìm số nguyên x biết:
(x-32+11)=21-33+7
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(x-32+11)=(21-33+7)
(x-32+11)=-5
x-33 =-5-11
x-33 =-16
x =-16+33
x =17
Ta có : ( x - 32 + 11 ) = ( 21 - 33 + 7 )
=> x - 32 + 11 = -5
=> x - 32 = -5 - 11
=> x - 32 = -16
=> x = -16 + 32
=> x = -16
Vậy x = -16
1.\(\dfrac{8}{11}+\dfrac{8}{33}\times\dfrac{3}{4}=\dfrac{8}{11}+\dfrac{8\times3}{33\times4}=\dfrac{8\times12}{11\times12}+\dfrac{8\times3}{33\times4}=\dfrac{8\times15}{132}=\dfrac{120}{132}=\dfrac{10}{11}\)
2.\(\dfrac{7}{9}\times\dfrac{3}{14}:\dfrac{5}{8}=\dfrac{7}{9}\times\dfrac{3}{14}\times\dfrac{8}{5}=\dfrac{4}{15}\)
3.\(\dfrac{5}{12}-\dfrac{7}{32}:\dfrac{21}{16}=\dfrac{5}{12}-\dfrac{7}{32}\times\dfrac{16}{21}=\dfrac{5}{12}-\dfrac{1}{6}=\dfrac{5-2}{12}=\dfrac{3}{12}=\dfrac{1}{4}\)
`@V.Tr.V`
b;\(\frac{x}{17}=\frac{60}{204}\)
=> \(x=60.17:204=5\)
c; \(6+\frac{x}{33}=\frac{7}{11}\)
=> \(6=\frac{7}{11}-\frac{x}{33}\)
=> \(6=\frac{21}{33}-\frac{x}{33}\)
=> \(6=\frac{21-x}{33}\)
=> \(21-x=198\)
=> \(x=21-198\)
=> \(x=-117\)
a,11-(15+21)=x-(25-9)
11-15-21=x-25+9
-x=-25+9-11+15+21
-x=9
x=-9
b,9-25=(7-x)-(25+7)
-16=7-x-32
x=7-32+16
x=-9
x-32+11=-12+7
x-32+11=-5
x+11=-5+32
x+11=27
x=27-11
x=16
x-32+11 =21-33+7
x-32+11 = -12+7
x-32+11 = -5
x-32 = -5 -11
x-32 = -16
x = -16 + 32
x = -16