(2, 3) is a solution only if it satisfies the equation.
x + 5y = 4
(2) + 5(3) =? 4
2 + 15 =? 4
17 = 4 False
Therefore, (2, 3) is not a solution to the given equation.
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5y-2y= 3y+2 5y-2y-3y= 2 0y= 2
Yes it is!
z = -4 x-5 y+2
x + 5y = 10 5y = -x + 10 y = -x/5 + 2 m = -1/5 or .2
(10, 2)