Answer: 18 c
Step-by-step explanation: since they have the same variables you can easily just add them together
Answer:
A
B
C
Step-by-step explanation:
11=4(7)-17
11=28-17
11=11
-13=4(1)-17
-13=4-17
-13=-13
-1=4(4)-17
-1=16-17
-1=-1