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the midpoint of (3 x, -2) and (-4, 5y) is (1,4). find x-y​

Sagot :

[tex]\left \{ {(3x-4)/2=1} \atop {(-2-5y)/2=4}} \right.[/tex]

x = 2

y = -2

x - y = 2 - (-2) = 4