Question

tìm số tự nhiên x,y biết

Answer 1

\(e,67+5x=87\\ 5x=87-67\\ 5x=20\\ x=20:5\\ x=4\\ f,36+64:\left(x-1\right)=52\\ 64:\left(x-1\right)=52-36\\ 64:\left(x-1\right)=16\\ x-1=64:16\\ x-1=4\\ x=4+1\\ x=5\)

Answer 2

e: =>5x+67=87

=>5x=20

=>x=4

f: =>36+64:(x-1)=52

=>64:(x-1)=16

=>x-1=4

hay x=5

Answer 3

`e)112-45+5x=87`

`67+5x=87`

`5x=87-67`

`5x=20`

`x=20:5=4`

_______________________

`f)6^2+64:(x-1)=52`

`36+64:(x-1)=52`

`64:(x-1)=52-36`

`64:(x-1)=16`

`x-1=64:16`

`x-1=4`

`x=4+1=5`