Zach you solve the system x plus y equals negative 3x minus y equals one and finds a solution one, negative to use the graph to explain whether zach solution is reasonable

Step-by-step explanation:

We are given system of equations as

X plus Y equals negative 3

so,

X minus Y equals one

so,

so, system of equations are

now, we can solve it

we can add both equations

now, we can solve for x

now, we can find y

so, solution is

now, we can draw graph

and then we can find intersection point

that is (-1,-2)

so, x=-1 and y=-2

which is same

so, Zach is right about solution

sorry, i can't understand your question. will later if you describe more clearly!

: )

it is x=-4

step-by-step explanation: