What connections can you make between solving systems of equations and solving one variable equations

At the many chips cookie company they are serious about the number of chocolate chips in their cookies they claim that each cookie hasn't c chips. if their claim is true there will be 200 chips in 10 cookies

Use set buikder notation to represent the following set: {, -2, -1, 0}

If 3x+8=3x+8 is it one solution or no solution