rozwiążcie równanie! pliska! ;*
0,2(X+2Y)-0,3(2X-Y)=3,5
2(X+Y)-(X-2)=2Y+2
0,2(x+2y)-0,3(2x-y)=3,5 /*2
2(x+y)-(x-2)=2y+2
2(x+2y)-3(2x-y)=7
2x+2y-x+2=2y+2
2x+4y-6x+3y=7
x+2=2
-4x+7y=7
x=0
-4*0+7y=7
7y=7
y=1
* - to oznacza razy
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0,2(x+2y)-0,3(2x-y)=3,5 /*2
2(x+y)-(x-2)=2y+2
2(x+2y)-3(2x-y)=7
2x+2y-x+2=2y+2
2x+4y-6x+3y=7
x+2=2
-4x+7y=7
x=0
-4*0+7y=7
x=0
7y=7
x=0
y=1
x=0
* - to oznacza razy