Simplifying and Combining Like Terms

Nicholas's teacher gave him the final expression "7x+5" and asked him to match this with two correct original expressions given in the list below .Which two original expressions simplify to 7x+5 ?

• 2x + 1+ 5x + 4

• 10x + 2 - 3x + 3

• x +2 + 4x + 5

• 2x+ 3+ 3x + 4

r + 10r

• 11r

• -11r

• 9r

• -11

Simplify:

5x - 6x - 8x + 7

• -9x + 7

• 10x + 7

• 9x + 7

• 9x - 7

Simplify   6(x + -2)

• 6x + -2

• 6x - 12

• 4x

• 6x - 2

Simplify the expression:
6 + 2(7x - 3) 

• 12 + 7x

• 14x

• 14x + 3

• 9 + 7x

• The 3y is being distributed

• 9 - 3x + 7

• 2 - 1.5x

• 7 - 1.5x

• 2 + 1.5x

Combine Like Terms

• 10r + 16

• 26r

• 22r + 16

a + a + a + a

• a + 4 

• 4a 

• a to the fourth power 

• 4a + 4 

6x + 2x 

• 8x 

• 12x 

• 8 

• 12