720 : ( a x 2 + a x 3 ) = 6

a x 2 + a x 3 = 720 : 6 = 120

a x 5 = 120

a = 120 : 5 = 24

720 :(  a x 2  +a x3) = 2 x3

 =>  720 : ( a x 5 ) = 6

=> ax5 = 720 :6

=> a x 5 = 120

=> a = 120 :5 

=> a = 24

≧◉◡◉≦

720 : ( X x5 )= 6

X x 5 = 720 : 6

X x 5 =120

X      = 120 : 5

X = 24

chúc bạn học tốt

720:(x.2+x.3)=2.3

=> 720:[x.(2+3)]=6

=> x.5              =720:6

=> x.5              =120

=> x                 =120:5

=> x                 =24

Vậy x=24

720 :[x +2 . x +3] =2.3

720:(x+2.x+3)=6

x+2.x+3=120

x.(2+3)=120

x.5=120

x=24

\(720:\left[X+2xX+3\right]=2x3\)

\(720:\left[x+\left(2+3\right)\right]=6\)

          \(x+5=720:6\)

           \(x+5=120\)

           \(x=120-5\)

           \(x=115\)

\(720:\left(x\times2+x\times3\right)=2\times3\)

\(720:\left(x\times5\right)=6\)

\(x\times5=720:6\)

\(x\times5=120\)

\(x=120:5\)

\(x=24\)

\(a.5+a=360:6\)

\(a\left(5+1\right)=60\)

\(a.6=60\)

\(a=\frac{60}{6}\)

Vậy\(a=10\)

a x 5 +a = 360 / 6

a (5+1) = 60

a x 6 = 60

a = 10

vậy a = 10

 hc tốt

??????

??? ...

??????????????????????????????????????????????????...............................................

61721

Lời giải

720: a x ( 3 + 5 ) = 6 

=> a x 8 = 720 : 6 
=> a x 8 = 120 
=> a = 120 : 8 
=> a = 15 

\(x\) x 13 + 6 = 84

\(x\) x 13 = 84 - 6

\(x\) x 13 = 78

\(x\) = 78 : 13

\(x\) = 6

720 : (\(x\) x 5) = 2 x 3

720 : (\(x\) x 5) = 6

\(x\) x 5 = 720 : 6

\(x\) x 5 = 120

\(x=120:5\)

\(x\) = 24

\(x\) x 8 - 22 = 13 x 2

\(x\) x 8 - 22 = 26

\(x\) x 8 = 26 + 22

\(x\) x 8 = 48

\(x\) = 48 : 8

\(x\) = 6

\(120-\left(x\times3\right)=30\times3\)

\(120-\left(x\times3\right)=90\)

\(x\times3=120-90\)

\(x\times3=30\)

\(\Rightarrow x=10\)