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4=(3x-y)2-(x+y)/4 całośc razy 4
-5x+5y+50=2y+10y
16=6x-2y-x-y
-5x-7y=-50
5x-3y=16
-10y=-34
y=3,4
5x=16+10,2
5x=26,2
x=4,04
(minus przed ułamkiem) x-y/2 + 5 = x+5y/5
4= 3x-y/2 - x+y/4
-(x-y)/2+5=(x+5y)/5 / * 10
4=(3x-y)/2-(x+y)/4 / *4
-5(x-y)+50=2(x+5y)
16=2(3x-y)-(x+y)
-5x+5y+50=2x+10y
16=6x-2y-x-y
-7x-5y=-50 / * 3
-5x+3y=-16 /* 5
-21x-15y=-150
-25x+15y=-80
..................
-46x=-230
x=5
-7x-5y=-50
-7*5-5y=-50
-5y=-50+35
y=3
x=5
y=3