a. In the diagram, the solution of the two simultaneous equation is (2, 7)
b. The value of y in both equations are equal
ii)When compared to a, the value of y is identical
How to find the solution
The solution is the point the two lines intersect.
Investigating the diagram, shows that this is point (2, 7)
Substituting the values
y = 2x + 3 for (2, 7)
y = 2(2) + 3 = 7
y = -x + 9
y = -(2) + 9 = 7
The value of y in both equations are equal