Giúp em với ạ help my

`a) 17*6^2 - 230 : x = 589`

`=> 230 : x = 17 * 36 - 589`

`=> 230 : x = 23`

`=> x = 230 : 23`

`=> x = 10`

Vậy `x = 10`

`b) 293 - 2^3*3^3 + x : 25 = 80`

`=> 293 - 8*27 + x : 25 = 80`

`=> 293 - 216 + x : 25 = 80`

`=> 77 + x : 25 = 80`

`=> x : 25 = 80 - 77`

`=> x : 25 = 3`

`=> x = 3 xx 25`

`=> x = 75`

Vậy `x = 75`

`c) 4*5^2-x:2^3=91`

`=> 4 * 25 - x : 8 = 91`

`=> 100 - x : 8 = 91`

`=> x : 8 =100-91`

`=> x : 8 = 9`

`=> x = 9*8`

`=> x = 72`

Vậy `x = 72`

`d) 240 : (x-5) = 2^2*5^2-20`

`=> 240 : (x-5) = 4 * 25 - 20`

`=> 240 : (x-5) = 80`

`=> x - 5 = 240 : 80`

`=> x - 5 = 3`

`=> x = 3 + 5`

`=> x = 8`

Vậy `x = 8`