Carol H. answered 09/17/17
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Experienced Mathematics Tutor w/ Master's Degree in Math
-x + 2y = 4
2y = x + 4
y = (1/2)x + 2
y = (1/2)(-2) + 2 = -1 + 2 = 1
(-2,1)
y = (1/2)(0) + 2 = 0 + 2 = 2
(0,2)
y = (1/2)(2) + 2 = 1 + 2 = 3
(2,3)