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y=-30
2) 6b-3=-9
6b=-6
b=-1
3)0,4m-2=-6
0,4m=-4
m=-10
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y=-30
2) 6b-3=-9
6b=-6
b=-1
3)0,4m-2=-6
0,4m=-4
m=-10
y=10*(-3)
y=-30
2) 6b-3=-9 /+3
6b=-6 /:6
b=-1
3)0,4m-2=-6 /+2
0,4m=-4 /:0,4
m=-40:4
m-10