1answer.
Меню
Ask question
Login
Signup
Ask question
Menu
All categories
English
Mathematics
Social Studies
Business
History
Health
Geography
Biology
Physics
Chemistry
Computers and Technology
Arts
World Languages
Spanish
French
German
Advanced Placement (AP)
SAT
Medicine
Law
Engineering
luda_lava
[24]
3 years ago
6
What is x+y=3 2x+4y=8
Mathematics
Answer
Comment
Send
1
answer:
jolli1
[7]
3 years ago
7
0
X + y = 3
2x + 4y = 8
This is a system of equations. You can solve it using elimination. Start by multiplying the top equation by -2.
(x * -2) + (y * -2) = (3 * -2)
-2x - 2y = -6
Now add that and the bottom equation. This will cancel out x.
-2x - 2y = -6
+ 2x + 4y = 8
-----------------------
2y = 2
Solve for y.
2y = 2
y = 2/2
y = 1
Now plug 1 in for y in the first equation.
x + y = 3
x + 1 = 3
Solve for x.
x + 1 = 3
x = 3 - 1
x = 2
So x = 2 and y = 1.
Send
You might be interested in
Help PLZZZZ............
lions [1.4K]
Answer:
A or B
Step-by-step explanation:
4
0
2 years ago
Rick bought 3 shirts for $18 each, 2 pair of socks for $3.99 a pair, and a pair of leggins for $45.00. The sales tax rate is 8.5
Inessa [10]
3 x 18 = $54
2 x 3.99 = $7.98
1 x 45.00 = $45.00
Add: $54 + 7.98 + 45 = $106.98
Multiply: $106.98 x 0.085 = 9.093
Add: $106.98 + $ 9.09 = $116.07
He paid $116.07 total.
6
0
3 years ago
10 times the square root of 96
OverLord2011 [107]
The answer is 40 square root of 6.
8
0
3 years ago
Read 2 more answers
45/55 expressed as a percentage
KATRIN_1 [288]
45 / 55 = 0.818 = 81%
8
0
3 years ago
Read 2 more answers
What is 100,000-3002
astra-53 [7]
Answer:
96998
Step-by-step explanation: just minus
3
0
2 years ago
Read 2 more answers
Other questions:
5y-8z-(z+3y)+5(y-2z)
15
·
1 answer
1. A hummingbird's brain has a weight of approximately 2.04 x 10^-3 ounces. An elephant's brain has a weight of approximately 1.
13
·
1 answer
If One lap around the track equals one fourth of a mile. a horse ran a distance of 9 laps in 2 minutes 30 seconds. What is the h
14
·
1 answer
David buys a house for $300,000. Each year, when the house is assessed, it increases in value by 5%. Is it a continuous or discr
11
·
2 answers
What is a terminating decimal
11
·
1 answer
What is the value of x that makes the equation true? 3(4x - 2) - 5x = 6 - 7(-x - 2)
5
·
1 answer
X + 5 = 2y + 5<br> What can I conclude using only the Symmetric Property of Equality?
10
·
1 answer
A square pyramid. The square base has side lengths of 6 inches. The 4 triangular sides have a base of 6 inches and height of 9 i
14
·
1 answer
Help assap A lot of points
10
·
1 answer
Napoleon Crossing the Alps
12
·
2 answers
×
Add answer
Send
×
Login
E-mail
Password
Remember me
Login
Not registered?
Fast signup
×
Signup
Your nickname
E-mail
Password
Signup
close
Login
Signup
Ask question!