Sign In
Ask Question
Mathematics
Tommy
25 October, 16:43
Solve for x and y
5x + 3y = 7
y = 4
+2
Answers (
1
)
Oliver Allen
25 October, 17:57
0
Answer: x = - 1 y = 4
Step-by-step explanation:
We are going to solve this using substitution.
Here is the work ...
5x+3 (4) = 7
That is what it woud look like because y is equal to 4.
3 times 4 is 12.
So now we have ...
5x+12=7
Now we want to get All the common factors together ...
To do this we will subtract 12 from 7 and we get - 5.
Here is our equation now ...
5x=-5
Now we divide x by 5 to get x alone, but we also divide - 5 by 5.
x=-1
Now all we have to do to solve for y is put x in an equation.
In this case here is what we will do ...
5 (-1) + 3y=7
Multiply ...
-5+3y=7
Now we need to get the common factors together so lets add 5 to 7.
3y=12
3y/3=y
12/3=y
y=4
But that is already in your problem ... OOF. Dont worry its still correct.
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Get an answer to your question ✅
“Solve for x and y 5x + 3y = 7 y = 4 ...”
in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
It took a skydiver 15 seconds to drop 450 feet. What is the rate (in feet per/second) of the skydiver's drop?
Answers (2)
The length of a base of a rectangular prism is twice the width of the base. the height of the prism is 3 times the width of a base. the surface area is 792 square centimeters. what are the dimensions of the prism?
Answers (1)
If you end up with 2=-2 when solving a linear equation in one variable, what is the equation called and what is the solution? List two ways to write the answer.
Answers (1)
Last night Davis did homework for 5/6 of an hour. He spent 1/3 of that time working on math. Which model shows the fraction of an hour he worked on math?
Answers (1)
When X=5 and y=10 in the formula A = xy-20. Find A
Answers (1)
New Questions in Mathematics
Wallace received a 28 percent discount on an item priced at $275. What is the total price that he paid for it?
Answers (1)
Write 8/3 as a decimal
Answers (1)
What is 5.6 as a fraction?
Answers (2)
How many times does 12 go into 80 the times you have done 12 into 80 is when you count to 12 or 80 or do 80 or 12 jumping jacts solution that is how many times you or another kid does 12 into 80.?
Answers (1)
Simplify the expression (-6+i) / (-5+i)
Answers (1)
Home
»
Mathematics
» Solve for x and y 5x + 3y = 7 y = 4
Sign In
Sign Up
Forgot Password?