-(5a+b)-3(2a-3b)=
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-(5a+b)-3(2a-3b)=
-(5a+b)-3(2a-3b)=
-(5a+b)-3(2a-3b)=
-(5a+b)-3(2a-3b)
=-5a-b-6a+9b
=-11a+8b
-5a-b-6a+9b=-11a+8b
-(5a+b)-3(2a-3b)=
-(5a+b)-3(2a-3b)=
-(5a+b)-3(2a-3b)=
-(5a+b)-3(2a-3b)
=-5a-b-6a+9b
=-11a+8b
-5a-b-6a+9b=-11a+8b