emmaculatemumbua14 emmaculatemumbua14
  • 15-04-2021
  • Mathematics
contestada

x+y=7
3x+y=15
solve by substitution method​

Respuesta :

lolabae2
lolabae2 lolabae2
  • 15-04-2021

Step-by-step explanation:

x =7-y

subs x in eqn 2

3(7-y)+y=15

21-3y+y=15

21-2y=15

21-15=2y

6=2y

y=6/2

y=3

Answer Link

Otras preguntas

How do I become better using mental math?
Which of the following statements about the phases of federalism is false?
If you distribute a negative factor, should you flip the inequality symbol? And why be specific
Rachel made a mosaic from different color rectangle tiles 3 tiles measured three and a half inches x 3 inches 6 tiles measures 4 inches x 3 1/4 inches what is t
Which of the following particles has almost no mass? proton neutron electron
what does cual es la fecha de manana means
Public opinion is of most value when people with an educated opinion voice that opinion. True or False
All of the following helped establish adolescence as a distinct life stage in the United States except: a. The establishment of more strict labor laws on youth
what is a geometric tool used to measure? It is 10 letters
The active sections that are located along fault lines are called a. recurrence gaps. b. stress accumulations. c. seismic risks. d. seismic gaps.