Simplify expressions by combining like terms

r + 10r

• 11r

• -11r

• 9r

• -11

-4x - 10x

• -14

• 6x

• -6x

• -14x

-2x + 11 + 6x

• 8x+11

• 4x +11

• 4x

• 15x

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4

• 2a + 2b + 4

• 8ab

• 4ab + 4

Simplify the following expression:
-10x + 15 - 3x + 2

• 13x² + 17

• -13x² + 13

• -13x + 17

• -7x + 17

n -10 +9n -3=

• -3

• 9n-3

• n

• 10n -13