Answer:
First, you have to substitue 3 into x
20 - 5(3)
20 - 15
= 5
so the first one is 5
the next one we will do the same but with 4
20 - 5(4)
20 - 20
= 0
Step-by-step explanation:
20-5(3)
20-15
=5
than
20-5(4)
20-20
=0
and there is your answer
