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2x+2y-x+2=2y+2
-0,4x+0,7y=3,5
x=0
0,7y=3,5
x=0
x=0
y=5
(powinno byc dobrze - ale nie jestem na 100% pewien;P)
0,2x+0,4y-0,6x+0,3y=3,5 /×10
2x+2y-x+2=2y+2
2x+4y-6x+3y=35
x=0
-4x+7y=35
0+7y=35
y=35:7
y=5
x=0
y=5
2x + 2y - x + 2 = 2y + 2
-0.4x + 0.7y = 3.5
x= 0
1 + 0.7y = 3.5
0.7y = 3.5
7y = 35 /:7
y = 5
y = 5
x = 0