Question

How do I do this my teacher just assigned this and I don’t know what to do ?

Answer 1

We need to subtract both expressions, then simplify it and make only one expression:

First, subtract both expressions:

$(-3x+9y)-(8x-6y)$

Then:

$-3x+9y-8x+6y$

Now, simplify like terms:

$-11x+15y$

Therefore, the result expression is -11x+15y.