
Kenneth S. answered 05/06/16
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
It must be understood that this is two separate problems, not a system of two equations.
X=9; (9,6) ...this ordered pair satisfies this equation, which merely states that X shall equal nine.
Y= -7; (-7,0)...this ordered pair does not satisfy this equation, because the Y coordinate is zero and does not equal Y=-7.