The answer is number 4. No, he is not correct and the correct answer is: 10r + 10
Sent a picture of the solution to the problem (s). Just rotate pic.
Answer:
91 .
Step-by-step explanation:
The least common multiple (LCM) of two or more non-zero whole numbers is the smallest whole number that is divisible by each of those numbers. In other words, the LCM is the smallest number that all of the numbers divide into evenly. Glad I could help!!
Answer:

Step-by-step explanation:
--- 1
--- 2
---3
-1 times the second equation =
=
--4
Now we are given that replace the third equation by the sum of itself and -1 times the second equation
So, New third equation = 
= 
Hence the new third equation is 