Question

Find the value of x when y = 16.y = -5x + 4x = ?

Answer 1

`y=-5x+4`

To find the value of x when y=16. Substitute in the equatio the y for 16:

`16=-5x+4`

Solve x:

-Subsrtact 4 in both sides of the equation

`\begin{gathered} 16-4=-5x+4-4 \\ 12=-5x \end{gathered}`

-Divide both sides of the equation into -5:

`\begin{gathered} (12)/(-5)=(-5)/(-5)x \\ \\ -(12)/(5)=x \end{gathered}`Then, when y is 16, x is -12/5 or -2.4