a) 3x+8=3(-0,5)+8=(-1,5)+8=6,5
b) -2x-3y+4=-2(-0,5)-3(0,1)+4=1-0,3+4=4,7
c) (-5m)+(-4m)=(-9m) (-9)(-2)=18
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a) 3x+8=3(-0,5)+8=(-1,5)+8=6,5
b) -2x-3y+4=-2(-0,5)-3(0,1)+4=1-0,3+4=4,7
c) (-5m)+(-4m)=(-9m) (-9)(-2)=18