Question

If

x
=
4
and
y
=
7
, evaluate the following expression:
20
−
(
3
y
−
4
x
)

Answer 1

15

Explanation:

given solution

x=4 20-(3y-4x) substitute

y=7 20-(3(7)-4(4))

20-(21-16)

20-5

answer =15