Answer:
B: (5, 12)
Step-by-step explanation:
Find the solution of the following system of linear equations:
3x- y=3
y=2x +2
Note that the 2nd equation has already been solved for y. Thus, subbing 2x + 2 for y in the 1st equation is the way to go:
3x - (2x + 2) = 3.
Simplifying, 3x - 2x - 2 = 3, and so x = 3 + 2 = 5.
Subbing 5 for x in the 2nd equation yields y = 2(5) + 2, or y = 12.
The solution is B: (5, 12)
