5- (x-18) = 32
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15 x 5 x 3 x ( 18 x 32 - 8 x 32 - 10 x 32 )
= 15 x 5 x 3 x { 18 - 8 - 10 } x 32 }
= 15 x 5 x 3 x 0
= 0
Vì số nào nhân với 0 cx bằng 0
15 x 5 x 3 x ( 32 x (18-8-10)
15 x 5 x 3 x(32 x 0 )
15 x 5 x 3 0 = 0
h nha
a: \(=\dfrac{18}{51}\cdot\dfrac{34}{9}\cdot\dfrac{17}{18}=\dfrac{17}{51}\cdot\dfrac{34}{9}=\dfrac{1}{3}\cdot\dfrac{34}{9}=\dfrac{34}{27}\)
b: \(=\dfrac{21}{32}\cdot\dfrac{4}{7}\cdot25\cdot\dfrac{4}{5}=\dfrac{21}{7}\cdot\dfrac{4}{32}\cdot20=60\cdot\dfrac{1}{8}=\dfrac{15}{2}\)
a) 32 : 4 : 2 = 8 : 2 = 4
32 : 4 : 2 = 32 : 2 = 16
b) 18 : 2 x 3 = 18 : 6 = 3
18 : 2 x 3 = 9 x 3 = 18
X : 8 x 32 + X : 3 x 18 - X : 5 x 10 = 120
X : (32 :8 ) + X : ( 18 :3 ) - X : ( 10 : 5 )
X = ( 4 +6 -2 )=120
X= 8 = 120
X=120 :8
X = 15
\(x\div8\times32+x\div3\times18-x\div5\times10=120\)
\(x\div\left(8\div32\right)+x\div\left(3\div18\right)-x\div\left(5\div10\right)=120\)
\(x\div\frac{1}{4}+x\div\frac{1}{6}-x\div\frac{1}{2}=120\)
\(x\div\left(\frac{1}{4}+\frac{1}{6}-\frac{1}{2}\right)=120\)
\(x\div\frac{-1}{12}=120\)
\(x=120\times\frac{-1}{12}\)
\(x=-10\)
`x/8=4/(-32)`
`(4x)/32=(-4)/32`
`4x=-4`
`x=-1`
Vậy `x=-1`.
`b)x-7/18=3 5/12`
`x-7/18=41/12`
`x=41/12+7/18`
`x=137/36`
Vậy `x=137/36`
`c)-3/8. 2/5+(-3)/8. 9/5-(-3)/8. 6/5`
`=-3/8. 2/5-3/8. 9/5+3/8. 6/5`
`=3/8(-2/5-9/5+6/5)`
`=3/8.(-1)`
`=-3/8`
\(\frac{32^5\cdot81^4}{18^6\cdot16^5}=\frac{4^5\cdot8^5\cdot\left(9^2\right)^4}{2^6\cdot9^6\cdot\left(4^2\right)^5}=\frac{\left(2^2\right)^5\cdot2^5\cdot3^5\cdot\left(3^{2^2}\right)^4}{2^6\cdot\left(3^2\right)^6\cdot\left(2^{2^2}\right)^5}=\frac{2^{10}\cdot2^5\cdot3^5\cdot3^{16}}{2^6\cdot3^{12}\cdot2^{20}}=\frac{2^{15}\cdot3^{21}}{2^{26}\cdot3^{12}}=\frac{3^9}{2^{11}}\)
5-(x-18)=32
(x-18)=5-32
x-18= -27
x =-27+18
x =-9