ariana524 ariana524
  • 19-01-2021
  • Mathematics
contestada

— 4х + 7y = 20
у = 3х + 15

Respuesta :

Аноним Аноним
  • 19-01-2021

Answer:

x=-5

Step-by-step explanation:

[tex]-4x+7(3x+15)=20\\ -4x+21x+105=20\\ 17x+105=20\\ 17x=20-105\\ 17x=-85\\ x=-5[/tex]

Answer Link

Otras preguntas

what is the function of lissome?
How does the modern era differ from the post-classical era?
When a Doctor practices Paediatrics, what sort of patients does he have ?
You have been cleaning diesel dispensers for 35 minutes. You have completed 6 dispensers. How many minutes has it taken you to clean 1 dispenser?
You have been cleaning diesel dispensers for 35 minutes. You have completed 6 dispensers. How many minutes has it taken you to clean 1 dispenser?
-6(a+8) how do I simplify ?
use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. Note: It is not necessary to
Walters savings account has a balance of $273. After 5 years, what will the amount of interest be at 5% compounded quarterly?
if a+b+c=0 for a,b,c then prove a²/bc+b²/ca+c²/ab=3.
What is the answer to 5x-7y=14