Question

How do i do this ? and show it step by step please

Answer 1

`(2)/(a)-(6)/(a)=(2-6)/(a)=\boxed{(-4)/(a)=-(4)/(a)}\\\\\\-(7)/(10)-\left(-(6)/(10)\right)=(-7)/(10)+(6)/(10)=(-7+6)/(10)=\boxed{(-1)/(10)=-(1)/(10) }`