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Which ordered pair satisfies the given system of equations?

Which ordered pair satisfies the given system of equations?-example-1
User Typeof
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1 Answer

6 votes

Answer: D. (2, 7)

Explanation:

This is a system of equations, so we can solve a few different ways. The first way is to solve by graphing. We will graph both of the given equations, the point of intersection is the solution. I have attached this below. This point is option D, (2, 7).

Another method is to use the substitution method. We will solve one equation for a variable and then substitute it into the second.

5x - y = 3 ➜ y = 5x - 3

-5x + 2y = 4

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

-5x + 10x - 6 = 4

5x - 6 = 4

5x = 10

x = 2

This leads us to answer option D, (2, 7).

Which ordered pair satisfies the given system of equations?-example-1
User Stux
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