Sign In
Ask Question
Savanna
Mathematics
4 April, 06:40
What is solution 7x+5y=-24 and 4x+y=42?
+2
Answers (
2
)
Elliana Sellers
4 April, 06:55
0
{ 7x + 5y = - 24
{ 4x + y = 42 ⇒ y = 42 - 4x
7x + 5y = - 24
7x + 5. (42 - 4x) = - 24
7x + 210 - 20x = - 24
7x - 20x = - 24 - 210
- 13x = - 234. (-1)
13x = 234
x = 234
13
x = 18
4x + y = 42
4. (18) + y = 42
72 + y = 42
y = 42 - 72
y = - 30
S = { 18, - 30 }
Comment
Complaint
Link
Sasha Dickson
4 April, 06:59
0
7x+5y=-24 (1)
4x+y=42 (2)
multiply equation (2) by 5 to get
20x+5y=210 (3)
then calculate (3) - (2) which gives you
13x=234 hence x=18
then substitute for x in either equation to get y=-30
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“What is solution 7x+5y=-24 and 4x+y=42? ...”
in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
You get a 180-day $3,000 consumer loan at 9% interest You are required to pay a $100 setup fee at the time you get the loan. Based on a 365-day year, calculate the APR. Express the rate to the nearest tenth of a percent.
Answers (1)
Line segment AB has a length of 5 units. It is translated 3 units to the right on a coordinate plane to obtain line segment A prime B prime. What is the length of A prime B prime? 2 units 3 units 4 units 5 units
Answers (1)
What is the lengthof a hypotenuse of the right triangle ABC in the figure
Answers (1)
Solving System Of Equations by Elimination 1.) - 14 = - 20y - 7x 10y + 4 = 2x 2.) 3 + 2x - 7y = 10x -3 - 7y = 10x
Answers (1)
The elevation of a fish is - 27 feet. a. The fish decreases its elevation by 32feet, and then increases its elevation by 14 feet. what is the new elevation? b. Your elevation is 2/5 of the fish's new elevation. What is your elevation?
Answers (1)
New Questions in Mathematics
A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?
Answers (1)
I am very confused on how to figure out if y = 3/4x is proportional?
Answers (2)
Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?
Answers (2)
At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?
Answers (1)
Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.
Answers (1)
Home
»
Mathematics
» What is solution 7x+5y=-24 and 4x+y=42?
Sign In
Sign Up
Forgot Password?