Question

Hi can you help me with an algebra assignment pleasy=-7x,y=4x+22 solve the system by substitution.

Answer 1

Given:

`\begin{gathered} y=-7x \\ y=4x+22 \end{gathered}`

Put y=-7x in second equation,

`\begin{gathered} y=4x+22 \\ -7x=4x+22 \\ -7x-4x=22 \\ -11x=22 \\ x=-(22)/(11) \\ x=-2 \end{gathered}`

Put the value of x in first equation,

`y=-7x=-7(-2)=14`

Answer: x = -2, y = 14.