Question

Giúp mik vs mik đang cần gấp 

Answer 1

`g) 4704 :(24+2*x) =56`

`=> 24+ 2x= 4704/56 = 84`

`=> 2x = 84 -24 = 60`

`=> x =60/2 =30`

Vậy `x=30`

`h)2210:(3x+2) +15 =100`

`=> 2210:(3x+2) =100 -15 = 85`

`=> 3x+2 =2210/85 = 26`

`=> 3x = 26 -2 =24`

`=> x=24/3 = 8`

Vậy `x=8`

`i)(2x+3)(5x-15) =0`

`=> [(2x+3=0),(5x-15=0):}`

`<=> [(2x=-3),(5x=15):}`

`<=> [(x=-3/2),(15/3=3):}`

Vậy `x in {-3/2;3}`

`k)(3x+1)(3x-9) =0`

`<=> [(3x+1=0),(3x-9=0):}`

`<=> [(3x=-1),(3x=9):}`

`<=> [(x=-1/3),(x=9/3=3):}`

Vậy `x in {-1/3;3}`