Tìm x c) 5(x – 12)+ 22 = 92 g) 9x + 2.3^2= 3^4 j) 95-5(x+2) = 45 n) 9x + 2.3^2 = 3^4

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1. `c) => 5(x-12)=92-22=70`

   `=> x-12=70:15=14`

   `=> x=14+12=26`

   g) giống n

   `j) 95-5(x+2)=45`

   `=> 5(x+2)=95-45=50`

   `=> x+2=50:5=10`

   `=> x=10-2=8`

   `n)9x+2.3^2=3^4`

   `=> 9x+18=81`

   `=> 9x=81-18=63`

   `=> x=63:9=7`

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2. c) $5(x-12)+22=92$

   $5(x-12)=92-22$
   $5(x-12)=70$
   $x-12=70:5$
   $x-12=14$
   $x=14+12$
   $x=26$
   g) $9x+2.3^2=3^4$

   $9x+18=81$
   $9x=81-18$
   $9x=63$
   $x=63:9$
   $x=7$
   j) $95-5(x+2)=45$

   $5(x+2)=95-45$
   $5(x+2)=50$
   $x+2=50:5$
   $x+2=10$
   $x=10-2$
   $x=8$
   n) $9x+2.3^2=3^4$

   $9x+18=81$
   $9x=81-18$
   $9x=63$
   $x=63:9$
   $x=7$

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