Question 120115
Which of the ordered pairs 
(0, 2), (4, 0), (0, –2), (–8, 6) 
are solutions for the equation x + 2y = 4?
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(0, 2): 0+2*2=4 ; true
(4, 0): 4+2*0=4 ; true
(0,–2): 0+2*-2=4; false
(–8,6): -8+2*6=4; true
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Cheers,
Stan H.