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(9 x 8 - 12 - 5 x 12) x (1 x 2 x 3 x 4 x 5)
=(3 x 3 x 2 x 4 - (12 + 12 x 5)) x (1 x 2 x 3 x 4 x 5) (ko có ngoặc vuông.sorry)
=(12 x 6 - 12 x 6) x (1 x 2 x 3 x 4 x 5)
=0 x (1 x 2 x 3 x 4 x5)
=0
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( 3x - 6 ) . 3 = 81
3x - 6 = 81 : 3
3x - 6 = 27
3x = 27 + 6
3x = 33
x = 33 : 3
x = 11
Vậy x = 11
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\(x+2^4=2^{1000}\div2^{995}\)
\(x+2^4=2^{1000-995}\)
\(x+2^4=2^5\)
\(x=2^5-2^4\)
\(x=32-16\)
\(x=16\)
x+2^4=2^1000:2^995
x+2^4=2^(1000-995)
x+2^4=2^5
x=2^5-2^4
x=32-16
x=16
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\(\Leftrightarrow x-1+x-2+x-3=2007\)
\(\Leftrightarrow3x-6=2007\)
\(\Leftrightarrow3x=2013\)
\(\Leftrightarrow x=671\)
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1+1+2.15+1+3(23456.7968798.(234233-234233))
=2+30+1+3(23456.7968798.0)
=33+3.0
=33
1+1+2.15+1+3(23456.7968798.(234233-234233))
=2+30+1+3(23456.7968798.0)
=33+3.0
=33
24 : 2 x ( 6 - 3 )
= 12 x 3
= 36
Giải :
24 : 2 x ( 6 - 3 )
= 24 : 2 x 3
= 12 x 3
= 36