Register

If 4m-7n=10 and 2m+2n=4, what is the value of 2m-9n?

If 4m-7n=10 and 2m+2n=4, what is the value of 2m-9n?
9.5k views
1 vote
If 4m-7n=10 and 2m+2n=4, what is the value of 2m-9n?

User Long Quanzheng
by
8.3k points

1 Answer

6 votes
4m - 7n = 10
2m + 2n = 4 - multiply everything by -1.

4m - 7n = 10
-2m - 2n = -4 Add the 2 equations

(4m - 7n = 10)
+(-2m - 2n = -4)
-------------------------
2m - 9 n = 6.

The value of 2m - 9n would be 6.

User Wmik
by
8.2k points
← Prev Question Next Question →

Related questions

User Trickydisco
asked Dec 22, 2019 85.8k views
If 4m - 7n = 10 ans 2m + 2n = 4, then what is the value of 2m-9n
Trickydisco asked Dec 22, 2019
by Trickydisco
7.4k points
1 answer
1 vote
85.8k views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories

Other Questions

How do you can you solve this problem 37 + y = 87; y =
How do you estimate of 4 5/8 X 1/3
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Link Copied!