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6x=3x+2x-12
6x=5x-12
x=-12
spr. -12= -12/2-12/3-2
-12=-12
8y-3=11-1/2
8y-3=21/2+3
8y=27/2
y=27/2*1/8
y=27/16
spr.8*27/16-3=10,5