Answer:
[tex]\boxed{Amswer:-xy+x-10y+4}[/tex]
Step-by-step explanation:
→ [tex]Distribute~the~negative~sign:[/tex]
[tex]=6xy+4x-8y+-1(3x+2y+7xy-4)[/tex]
[tex]=6xy+4x+-8y+-1(3x)+-1(2y)+-1(7xy)+(-1)(-4)[/tex]
[tex]=6xy+4x+-8y+-3x+-2y+-7xy+4[/tex]
→ [tex]Combine~like~terms:[/tex]
[tex]=(6xy+-7xy)+(4x+-3x)+(-8y+-2y)+(4)[/tex]
[tex]=-xy+x+-10y+4[/tex]
