Question

If x= 3 and y = 7 evaluate the following expression:

20 - (3y - 4x)

Answer 1

11

Explanation:

20-(3y-4x)

replace the variables

20-(3*7-4*3)

multiply

20-(21-12)

subtract

20-(9)

20-9

answer=11

Answer 2

17

Explanation:

3x3=9 4x7=28 28+9=37 37-20=17