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\(\Rightarrow25^{x+2}=\left(\dfrac{90}{18}\right)^{24}=5^{24}=25^{12}\\ \Rightarrow x+2=12\\ \Rightarrow x=10\)
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\(90^{24}:25^{x+2}=18^{24}\\ \Leftrightarrow\left(5^2\right)^{x+2}=\dfrac{90^{24}}{18^{24}}=5^{24}\\ \Leftrightarrow5^{2x+4}=5^{24}\Leftrightarrow2x+4=24\Leftrightarrow x=10\left(D\right)\)
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\(\left[1824-\left(526+2x\right)\right]+318=1420\)
\(\left[1824-\left(526+2x\right)\right]=1420-318\)
\(\left[1824-\left(526+2x\right)\right]=1102\)
\(526+2x=1824-1102\)
\(526+2x=722\)
\(2x=722-526\)
\(2x=196\)
\(x=196\div2\)
\(x=98\)
Vậy x = 98
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32176 - 2530 : 5 + 1824
= 32176 - 506 + 1824
= 31670 + 1824
= 33494
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a)1824 - { 526 + 2x } = 1420 - 318
1824 - { 526 + 2x } = 1102
526 + 2x = 1824 - 1102
526 + 2x = 722
2x = 722 - 526
2x = 196
x = 196 : 2
x = 98
b) [ 215 - { 3x - 18 } ] = 5225 : 25
[ 215 - { 3x - 18 } ] = 209
{ 3x - 18 } = 215 - 209
{ 3x - 18 } = 6
3x = 6 + 18
3x = 24
x = 24 : 3
x = 8
k cho minh nha
{1824 - ( 526 + 2x ) }+ 318 = 1420
{ 1824 - ( 526 + 2x ) } = 1420 - 318
{ 1824 - ( 526 + 2x ) } = 1102
526 + 2x = 1824 - 1102
526 + 2x = 722
2x = 722 - 526
2x = 196
x = 196 : 2
x = 98
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a ) 7 21 + 9 36 = 1 3 + 1 4 = 4 12 + 3 12 = 7 12 ;
b ) 8 40 + − 36 45 = 1 5 + − 4 5 = − 3 5 ; c ) − 19 15 ; d ) − 41 28
x= 25 mũ 21 nhé
hok tốt
<=> 924.1024:(52)x+2=224.924
<=>1024:52x+4:224=924:924
<=>524:52x.54=1
<=>520:52x=1
<=>520=52x
<=>20=2x
<=>x=10
Vậy x=10