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(x-24).(x-2012)=0
=>
TH1: x-24=0 => x= 24
TH2: x-2012=0=> x=2012
chúc bn học giỏi.
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a)
<=> -x + x - 25 - 24 - 48 (vô nghiệm)
b)
<=> 36 - 2x - 5 = 11 - x
<=> -2x + x = 11 + 5 - 36
<=> -x = -20
<=> x = 20
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\(x\left(-7\right)=-5-14\)\
\(-7x=-5-14\)
\(-7x=19\)
\(-7.x=19\)
\(x=19:-7\)
\(x=\frac{19}{7}\)
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\(\frac{1}{4}+\frac{1}{3}:\left(2x-1\right)=-5\)
\(\frac{1}{3}:\left(2x-1\right)=-5-\frac{1}{4}\)
\(\frac{1}{3}:\left(2x-1\right)=-\frac{20}{4}-\frac{1}{4}\)
\(\frac{1}{3}:\left(2x-1\right)=-\frac{21}{4}\)
\(\left(2x-1\right)=\frac{1}{3}:-\frac{21}{4}\)
\(\left(2x-1\right)=\frac{1}{3}.-\frac{4}{21}\)
\(\left(2x-1\right)=-\frac{4}{63}\)
2x= -4/63 + 1
2x = 59/63
x = 59/63 : 2
x = 59/126
1/3:(2.x-1)=-5-1/4
1/3:(2.x-1)=-21/4
2.x-1=1/3:-21/4
2.x-1=-4/63
2.x=-4/63+1
2.x=\(3\frac{59}{63}\)
x=\(3\frac{59}{63}\):2
x=\(1\frac{61}{63}\)
30-28+26-24+....+4-2+x=1020
2+2+2+.....+2+x=2.510
2.7+x=2.510
x=2.510-2.7
x=1006