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\(A=\left(3^2\right)^{23}+5.3^{43}=3^{46}+5.3^{43}=3^{43}\left(3^3+5\right)=32.3^{43}⋮32\) (đpcm)
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a)
<=> (51.43) - (49.43) chia hết cho 43
<=> 51.43 chia hết cho 43 - 49.43 chia hết cho 43 => (51.43 - 49.43) chia hết cho 43
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 8x+x=9.12
9x =108
x =108:9
x =12
Vậy x=12
b) 5.3 -5x =4.25
15-5x =100
5x =15-100
5x =-85
x =-85:5
x = -17
Vậy x= -17
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1/(6x-32).35=5.37
(6x-9) = 5. 2187
(6x-9) = 10935
6x = 10935 + 9 =10944
x = 10944 : 6 =1824
2/8x-5.23=(5.2)3-53.23
/8x-5.8=1000-125.8
8x -40 = 0
8x = 40
x = 40 : 8 =5
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\(-8x-\left(-11\right)=43\)
\(\Leftrightarrow-8x=43-11\)
\(\Leftrightarrow-8x=32\)
\(\Leftrightarrow x=\dfrac{32}{-8}\)
\(\Leftrightarrow x=-4\)
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5.3x = 5.34
=> x = 4
5.34 = 7.35 - 2.35
= 35 . (7 - 2)
= 5. 35
=> 3x = 35
=> x = 5