Guys I have a question So I have a 22% on my math class and there are 3 assignments worth 100 points if I did those assignments what would my grade be???

To find out just

A. Divide the mark given for each small assignment by the possible mark for each small assignment.
B. Add the marks given for each assignment. Then add the possible marks given for each assignment. ...
C. Multiply the decimal by 100 to calculate the percentage.

3x - 8y = 19

3x + 5y = -46

As you can see in the image below the solution of the system of equations is (-7,-5).