0,2x+0,3y=2/*10
-2x-y=-18
2x+3y=20
3y-y=20-18
2y=2/:2
y=1
-2x+3*1=20
-2x=20-3
-2x=17/:(-2)
x=-8,5
-y = -18 + 2x
y = 18 - 2x
1/5x + 3/10y = 2/*5
x +3/2y = 10
x + 3/2 * (18 - 2x) = 10
x + 27 - 3x = 10
-2x = 10-27
-2x = -17 /: (-2)
x = 17/2
x = 8 i 1/2
y = 18 - 2 * 8 i 1/2
y = 18 - 17
y = 1
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0,2x+0,3y=2/*10
-2x-y=-18
2x+3y=20
-2x-y=-18
3y-y=20-18
2y=2/:2
y=1
-2x+3*1=20
-2x=20-3
-2x=17/:(-2)
x=-8,5
y=1
-2x-y=-18
-y = -18 + 2x
y = 18 - 2x
1/5x + 3/10y = 2/*5
x +3/2y = 10
x + 3/2 * (18 - 2x) = 10
x + 27 - 3x = 10
-2x = 10-27
-2x = -17 /: (-2)
x = 17/2
x = 8 i 1/2
y = 18 - 2 * 8 i 1/2
y = 18 - 17
y = 1