Question

Express y in terms of x. Then find the value of y when x= -14x - 3 = 0.4x - 2yY in terms of x:Y=

Answer 1

`4x-3=0.4x-2y`

we need to clear y in order to find the expression in terms of x

`\begin{gathered} 2y=0.4x-4x-3 \\ y=(1)/(2)(0.4x-4x-3) \\ y=(1)/(2)(-3.5x-3) \end{gathered}`

evaluating in x=-1

`\begin{gathered} y=(1)/(2)(-3.5(-1)-3) \\ y=(1)/(2)(3.5-3) \\ y=(1)/(2)(0.5) \\ y=(1)/(4) \end{gathered}`