-0,5 * y-4/5 + 0,2 * 2-y/2=9,5
-0,5y-0,8+0,4-y/2=9,5 /*2
-y-1,6+0,8-y=19
-2y-0,8=19 /+0,8
-2y=19,8 /:(-2)
y=-9,9
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-0,5 * y-4/5 + 0,2 * 2-y/2=9,5
-0,5y-0,8+0,4-y/2=9,5 /*2
-y-1,6+0,8-y=19
-2y-0,8=19 /+0,8
-2y=19,8 /:(-2)
y=-9,9