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4x>10-2m /*4
x>2,5-0,5m
x>4
2,5-0,5m=4 /-2,5
-0,5m= 1,5 /*(-2)
m= -3
b)-x+10>=3x+2m
-4x>=2m-10 /:-4
x<=-0,5m+2,5
x<7
cześc wspólna to x<7 zatem:
x<-0,5m+2,5
-0,5m+2,5=7
-0,5m=4,5
m= -9