Question

Solve the following system:

y = x + 3
2x + y = 9

A. (2, 5)
B. (5, 2)
C. (−2, 5)
D. (2, −5)

Answer 1

You can rewrite the second equation because you know what y equals, so you can write it as 2x + x + 3 = 9
3x + 3 = 9
- 3
3x = 6
÷ 3
x = 2

And now you use the equation of what y equals and substitute in the value of x, so y = 2 + 3
y = 5

So your final answer is A. (2, 5). I hope this helps!