Register
What is the value X? If 5x + 4y = 23, AND 3x - y = 7
13.9k views
15 votes
What is the value X?

If 5x + 4y = 23, AND 3x - y = 7

User Sudar
by
4.2k points

1 Answer

9 votes

Answer:

x=3

Explanation:

We can set up a system of equations:

5x+4y=23

3x-y=7

We can isolate y in the second equation:

-y=7-3x

y=3x-7

Then we can solve using substitution:

5x+4(3x-7)=23

Distribute

5x+12x-28=23

17x=51

Divide both sides by 17

x=3

User OzrenTkalcecKrznaric
by
4.3k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.7m questions

6.1m answers

Other Questions

I need to simplify this expression.
Which property is shown in the problem below? -8(x-3y-9) = -8x+24y+72 A the associative property B the commutative property C the distributive property D the division property ASAP
What is the domain and range?
What does translation means in math? I am taking a quiz on this right now, I need an answer ASAP!!!!!!
If in circle A is 60°, what is m∠BDC? A. 60 B. 45 C. 30 D. 25
Link Copied!