13x - 130 = 65

13x           = 65 + 130 

13x          = 195

x               = 195 : 13

x               = 15

k mình nha

13x - 130 = 65 

13x = 65 + 130 

13x = 195

x = 195 : 13 

x = 15

nha bn

=> 13x=130+65

=> 13x=195

=> x=195:13

=>x=15

tíc mình nhoa

=-65/2

\(104-4.\left(x-150\right)=48\)

\(=>4.\left(x-150\right)=104-48\)

\(=>4.\left(x-150\right)=56\)

\(=>x-150=56:4\)

\(=>x-150=14\)

\(=>x=14+150\)

\(=>x=164\)

_________________

\(\left(13x+39\right)-65=26.4^0\)

\(=>\left(13x+39\right)-65=26.1=26\)

\(=>13x+39=26+65\)

\(=>13x+39=91\)

\(=>13x=91-39\)

\(=>13x=52\)

\(=>x=52:13\)

\(=>x=4\)

a) 104.4.(x-150) = 48

4.(x-150) = 104 - 48

4. (x-150) = 56

x-150 = 56 : 4

x-150 = 14

x      = 14 + 150 

x       = 164

95959

Ta có : 

x + 65 x 2 = 130 

(=) x + 65 = 130 : 2 

(=) x + 65 = 65 

(=) x = 65 - 65 

(=) x = 0 

T ik nha bạn =)))

Chúc bạn học tốt nhé !!!

0000000000000000000000000

x+65*2=130

x+130=130

x=130-130

x=0

=375

750 : {130 – [(5 . 14 – 65)3 + 3]} 

= 750 : {130 – [(70 – 65)3 + 3]}

= 750 : {130 – [(5)3 + 3]}

= 750 : (130 – 128)

= 750 : 2

= 375

z kết quả là bao nhiêu z ạ ^^

A

a)\(72.19 - 36^2:18= 72.19- 36.36:18\)

\(=72.19 - 72=72.(19 - 1)\)

\(=72.18=1296\)

b)

\(\begin{array}{l}750{\rm{ }}:{\rm{ }}\left\{ {130{\rm{ }} - {\rm{ }}[{{\left( {5.{\rm{ }}14{\rm{ }} - {\rm{ }}65} \right)}^3} + {\rm{ }}3} \right\}\\ = 750{\rm{ }}:{\rm{ }}\left\{ {130{\rm{ }} - {\rm{ }}\left[ {{{\left( {{\rm{70 }} - {\rm{ }}65} \right)}^3} + {\rm{ }}3} \right]} \right\}\\ = 750{\rm{ }}:{\rm{ }}\left\{ {130{\rm{ }} - {\rm{ }}\left[ {{5^3} + {\rm{ }}3} \right]} \right\}\\ = 750{\rm{ }}:{\rm{ }}\left\{ {130{\rm{ }} - {\rm{ }}\left[ {125 + {\rm{ }}3} \right]} \right\}\\ = 750{\rm{ }}:{\rm{ }}\left\{ {130{\rm{ }} - {\rm{ 128}}} \right\}\\ = 750:2 = 375.\end{array}\)