2|x|-3|y| = 4
|x|+2|y| = 5 |•(-2)
2|x|-3|y| = 4
-2|x|-4|y| = -10
---------------------- (+)
/ -7|y| = -6 = 7|y| = 6 => |y| = 6/7 =>
=> y = ±6/7
2|x|-3•6/7 = 4
2|x|-18/7 = 4
2|x| = 4+18/7
2|x| = 46/7
=> |x| = 46/14 => x = ±46/14
=> (x,y) ∈ {±46/14, ±6/7}
