Question

Solve this system of equations usingthe substitution method.y = 4x3x – 7 = y1

Answer 1

Given:

`\begin{gathered} y=4x \\ 3x-7=y \end{gathered}`

Required:

To solve the given equations by using substitution method.

Step-by-step explanation:

Consider the given two equation

`\begin{gathered} y=4x------(1) \\ 3x-7=y--------(2) \end{gathered}`

Substitute equation (1) in (2), we get

`\begin{gathered} 3x-7=4x \\ 3x-4x=7 \\ -x=7 \\ x=-7 \end{gathered}`

Put x in (1), we get

`\begin{gathered} y=4(-7) \\ \\ y=-28 \end{gathered}`

Final Answer:

`(-7,-28)`