Question

Which ordered pair is the solution to the system of equations?

y= 2x – 15
4x + 3y = -5

A. (7, – 11)
B. (0, 6)
C. (4, - 7)
D. (5 - 5)

Answer 1

9514 1404 393

Answer:

C. (4, -7)

Explanation:

The first equation gives an expression for y that can be substituted into the second:

4x +3(2x -15) = -5

10x -45 = -5

10x = 40

x = 4 . . . . . . identifies C as the appropriate choice

y = 2(4) -15 = -7 . . . . confirms the choice