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{x+30=0.775y
0,15y+30=0,775y
0,625y=30 /:0,625
y=48
x=0,15·48
{x=7,2
{y=48
30+x=0.775y
x=0.15y
30+0,15y=0.775y
x=0.15y
30=0.625y
x=0.15y
y=48
x=7.2
y=48