Answer: The required system of equations can be set up in the following way :
[tex]y=x+8,\\\\y=-x+7.[/tex]
Step-by-step explanation: We are given to state the method to set up the following equation as a system of equations :
[tex]x+8=-x+7=0.[/tex]
Let us consider another unknown variable y so that the following relation holds :
[tex]y=x+8=-x+7.[/tex]
Then, we can write two equations from the above equation as follows :
[tex]y=x+8~~~~~~~~~~~~~~~~~~~~~~(i)\\\\y=-x+7~~~~~~~~~~~~~~~~~~~~(ii)[/tex]
Thus, we can set up the given equation as a system of equations in the following way :
[tex]y=x+8,\\\\y=-x+7.[/tex]
