Question

Which pair of expressions are equivalent?

A. 2y – 4 and 2y – 4 + 9
B .14x – 7 and 7x – 14
C. 9y + 3 + 2 and 3(y + 1) + 2
D. x + y and x – y + 2y
E. x + 2y and x – y

Answer 1

D is equivalent
x-y+2y=x+y

Answer 2

D: x + y and x -- y + 2y

Explanation:

The pair of expressions in the option D are equivalent. Equivalent expressions are those algebric expressions that will help you obtain the same results, even though they look different. (you can get the same results, independently of the number used in the place of the variables.)

x - y + 2y= x + y

- y + 2 y = + 1 y = + y

x + y; x + y