Question

9.5 x X + 2.5 x ( 1 - X ) = 3.95 hỏi X =

Answer 1

\(9,5x+2,5\left(1-x\right)=3,95\)

\(\Leftrightarrow9,5x+2,5-2,5x=3,95\)

\(\Leftrightarrow7x=1,45\)

\(\Leftrightarrow x=\dfrac{29}{140}\)

Answer 2

9,5.x+2,5.(1-x)=3,95` 

`⇒` `(14x+5)/2` `=` `79/20`

`⇒` `((14x+5).20)/20` `=` `(2.79)/20`

`⇒` `(4x+5).20=2.79`

`⇒` `14x+5=79/10`

`⇒` `14x=29/10`

`⇒` `x` `=` `29/140` `≈` `0,2071`