120 students are in the 7th grade.
1. added four to both sides
2. divided both sides by two
X stands for the score of her first test
Y stands for the score of her second test
Answer:
The solution to the system of equation is (0 , -2 , 1).
Step-by-step explanation:
You can check the solutions of the equations by putting the values of x, y, and z one by one.