corsi3541 corsi3541
  • 04-06-2021
  • Mathematics
contestada

A first number plus twice a second number is 4 twice the first number plus the second totals 11 find the number

Respuesta :

Ritmeks
Ritmeks Ritmeks
  • 05-06-2021

Answer:

6

Step-by-step explanation:

Let the first number be x

Let the second number be y

x + 2y= 4............equation 1

2x +y= 11............equation 2

From equation 1

x + 2y= 4

x = 4-2y

Substitute 4-2y for x in equation 2

2x + y= 11

2(4-2y) + y= 11

8-4y+y= 11

8-3y= 11

-3y= 11-8

-3y= 3

y= -1

Substitute -1 for y in equation 1

x + 2y= 4

x + 2(-1) = 4

x-2= 4

x = 4+2

x = 6

Hence the first number is 6

Answer Link

Otras preguntas

Please HELP with inequality and graph. !!!!!!
Write an explicit rule and recursive rule for a geometric sequence with a second term of 6 and a third term of 12.
True or False: 2y = -3x + 8 is an equation that represents a line parallel to the line 6x + 2y = 9.
Please help meeeeeeee
Which transformation is a rigid transformation?
WHAT'S THE LATEST SMARTPHONE RIGHT NOW???? I'M DOING A PROJECT ABOUT IT AND I NEED YOUR HELPPPPP​
1. The National Highway Traffic Safety Administration estimates that some _lives could be saved every year if all vehicle occupants used seatbelts. Choose one A
expectantly, sensation, pedestal , bugle meaning in one word​
When there is not enough oxygen, what is glucose converted to in animal cells?
PLEASE HELP!!!!! NEED HELP FAST! Which of the following themes is NOT contained in "The Necklace"? A) Appearances are deceiving B) Hard work Shapes a person's