Answer:
[tex]7x-8y[/tex]
Step-by-step explanation:
We have been given an expression [tex](-3y-x)-(5y-8x)[/tex]. We are supposed to simplify our given expression.
Using distributive property [tex]a(b+c)=ab+ac[/tex], we will get:
[tex]-3y-x-1*5y-1*-8x[/tex]
[tex]-3y-x-5y+8x[/tex]
Now, let us combine like terms.
[tex]-x+8x-5y-3y[/tex]
[tex]7x-8y[/tex]
Therefore, the simplified form of our given expression would be [tex]7x-8y[/tex].