### Home > A2C > Chapter 9 > Lesson 9.3.1 > Problem9-128

9-128.

Given the equation: $3x + y − z = 6$.

1. Draw a graph.

Notice that there are three variables. Find the 3 intercepts.

2. Is $\left(1, 2, −1\right)$ on the graph? Justify your answer.

Yes, it is a solution to the equation