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2x=-6,4-3,6
2x=-10/2
x=-5
spr.
3,6+2*(-5)=6,4
6,4=6,4
2(3-2y)-(y+5)=16
6-4y-(y+5)=16
6-4y-y-5=16
1-5y=16
-5y=15/-5
y=-3
spr.
2(3-2*(-3))-((-3)+5)=16
2(3+6)-2=16
6+12-2=16
16=16