Question

h)x:2=x:3

I)(4x+5):3-121:11=4

k)5x-x=84

l)0*(7-x)=0

Answer 1

`a, => x/2 = x/3`

`=> 3x = 2x`

`=> x = 0`.

`b, => (4x+5):3 - 11 = 4`

`=> (4x + 5) : 3 = 15`

`=> 4x + 5 = 45`

`=> 4x = 40`

`=> x = 10`

`c, 4x = 84`

`=> x = 84/4 = 21`

`d, 0.(7-x) = 0`

`=> 7 - x in RR`

`=> x in RR`

Answer 2

`x : 2 = x : 3`

`x/2 = x/3`

`=> (3.2) . x/2 = (3.2) . x/3`

`6 . x/2 = 6 . x/3`

`=> 3x = 2x`

`=> 0`

_________________
`(4x +5):3 - 121 : 11 = 4`

`(4x +5):3 -11 = 4`

`(4x+5):3 = 4+11`

`(4x+5):3=15`

`(4x + 5) = 15 xx 3`

`(4x+5) = 45`

`4x = 45 - 5`

`4x = 40`

`x=40:4`

`x=10`

_____________________

`5x - x = 84`

`5x-1.x=84`

`(5-1)x=84`

`4x=84`

`x=84:2`

`x=21`

________________________

`0.(7-x)=0`

`=>` \(\left[{}\begin{matrix}x=0\\7-x=0\end{matrix}\right.=>\left[{}\begin{matrix}x=0\\x=7\end{matrix}\right.\)