Question

Solve for x and y. any method can be used

Answer 1

21) Using the substitution method,

Notice that

`\begin{gathered} y=y \\ \end{gathered}`

Then,

`\begin{gathered} \Rightarrow4x-1=-2x-7 \\ \Rightarrow6x=-6 \\ \Rightarrow x=-1 \end{gathered}`

Finding its corresponding value of y,

`\begin{gathered} x=-1 \\ \Rightarrow y=4(-1)-1=-5 \\ \Rightarrow(x,y)=(-1,-5) \end{gathered}`

Therefore, the answer is x=-1, y=-5