use the substitution method to solve the system of equations . choose the correct ordered pairs x+y=5 y=7 A.(12,7) B.(-12,7) C.
(-2,7) D.(2,7)
1 answer:
Answer:
<em>C. (-2, 7)</em>
Step-by-step explanation:
Put y = 7 to the equation x + y = 5:
x + 7 = 5 <em>subtract 7 from both sides</em>
x = -2
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