### Home > CAAC > Chapter 2 > Lesson 2.1.8 > Problem 2-79

2-79.

Simplify each expression below as much as possible. Homework Help ✎

3

*y − y*+ 5*x*+ 3 − 7*x*−1 − (−5

*x*) − 2*x*+ 2*x*^{2}+ 76

*x*+ 2 − 1 − 4*x*− 3 − 2*x*+ 2

Try using an Expression Mat.

3*y* + (−*y*) + 5*x* + 3 + (−7*x*)

Combine like terms.

2*y* + (−2*x*) +3

Remember to remove unnecessary signs.

(Example: *x* + (−2) would be *x* −2

2*y* −2*x* +3

Follow the steps described in part (a).

Remember you cannot add variables with different exponent values. (Example: you cannot add *x* + *x*^{2})

2*x*^{ 2 }+ 3*x* +6