Question

If x=9 and y=−3, evaluate the following expression:20−5y+2x

Answer 1

The answer is 53.

Explanation:

x = 9

y = -3

`20 - 5y + 2x \\ 20 - 5( - 3) + 2(9) \\ 20 + 15 + 18 \\ 35 + 18 \\ 53`

Answer 2

53

Explanation:

20-5y+2x

20-5(-3)+2(9)

20--15+18

cancel out the negative signs

20+15+18

=53