Question

If x = 6 and y = –2, evaluate the following expression:
7(2x – 3y)

Answer 1

To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. This is:

7(2x – 3y)

= 7(2(6) – 3(-2))

= 7(12 + 6)

= 7(18)

= 126

Answer 2

14x-21y

Explanation: