Question

(A) tìm x:  4x+6=30 (B) tính C=4^18+1/4^19+1

Answer 1

(A) 4x = 30 - 6 <=> 4x = 24 <=> x = 6

 

 

Answer 2

35​ $\times$[ 21551​ - $x$]22 = 3553​

       [115511​ - $x$]2  = 3553​ : 5335​

      [ 115511​ - $x$]2 =   3553​ $\times$ 3553​

     [ 115511​ - $x$]2 = 925259​

      [115−�=−35115−�=35⎣⎡​511​−x=−53​511​−x=53​​

     [�=115+35�=115−35⎣⎡​x=511​+53​x=511​−53​​

     [�=145�=85⎣⎡​x=514​x=58​​

$x\in$ { 85;14558​;514​}

Answer 3

???,không hiểu