Answer:
2.1
Step-by-step explanation:
Parallel lines have the same slope, so the slope of the other line is also 1/6
Add 60+15, divide by 3, subtract 2
If you would like to solve the system of linear equations, you can do this using the following steps:
2x - y = -1 ... y = 2x + 1
2x + y = -7 ... y = -7 - 2x
The correct result would be: y = 2x + 1, <span>2x + y = -7.</span>
