leslyg2801 leslyg2801
  • 14-12-2021
  • Mathematics
contestada

x+y=15
- 2x+5y=-2

solve the system of equations

please answer i’ll name you brainliest

Respuesta :

EnergyStudies
EnergyStudies EnergyStudies
  • 14-12-2021

Answer:

x= 11 and y = 4

Step-by-step explanation:

(solving by elimination)

Multiply the first equation by 2 and multiply the second one by 1.

2(x+y= 15)

1(-2x+5y=-2)

is now

2x+2y=30

-2x+5y-2

add them together to eliminate x

7y=28

then solve for y

7y=28

[tex]\frac{7y}{7}[/tex]=[tex]\frac{28}{7}[/tex]

y=4

---

Now you have y. put that back into the original equation for X

---

x+y=15

y= 4 so

x+4=15

x= 15-4

x=11

x=11, y=4

Answer Link

Otras preguntas

How does check make sure the solution to an equation is correct?
ANSWER PLZ QUICK AND FAST
True or false: the soviet union was a u.s. enemy in world war ii.
Need help with this. Hope someone can help
2.998x10^8 m/s is how many kilometers per hour?
How much will 30 pencils because if 10 pencils cost $.59 and there is a $.10 discount if you purchase three dozen?
Porque da diarrea si tomas agua despues de tomar leche?
If a coin is tossed twice what is the probability that on the first toss the coin lands heads and on the second toss the coin lands tails
How to find molarity 1.mass 2. molar mass 3. volume of water added?
In _______ preparations are made for the nucleus to divide. g2 g1 s mitosis