Question

Marco states that both expressions are equal to X.Do you agree or disagree with Marco?Explain your thinking.

Answer 1

Disagree

Step-by-step explanation

To answer this question we have to simplify the expressions first. All the terms on each expression contain x, so we just have to add the coefficients:

`8x-7x=(8-7)x=1\cdot x=x`

The first expression is equal to x.

`-5x+5x=(-5+5)x=0\cdot x=0`

The second expression is not equal to x.

Therefore, Marco is wrong. Only one of the expression is equal to x, and the other is equal to zero.