victoriaelizabethcli victoriaelizabethcli
  • 26-01-2021
  • Mathematics
contestada

If 7x−6y=2 and −2x−y=3 are true equations, what would be the value of 5x−7y?

Respuesta :

angelsakire
angelsakire angelsakire
  • 26-01-2021

Answer:

-55

Step-by-step explanation:

7x-6y=2

-2x-y=3

by substitution method

y=3+2x

7x-6(3+2x)=2

7x-18-12x=2

-5x=20

x=-4

-2(-4)-y=3

8-y=3

-y=3-8

y=5

therefore the value of x=4 and that of y=5

5x-7y=5(-4)-7(5)

=-20-35

=-55

Answer Link

Otras preguntas

Find two consecutive perfect squares that 3 is between.
1. What kind of metrics would be useful that are based on testing knowledge after security awareness training? The metrics could be obtained immediately after t
The density of aluminum is 2.70 g/mL. What is the mass of a 15.9 cm X 11.6 cm X 7.3 cm block of aluminum?
Which of the following would be considered a special-purpose government? A Hartsfield Airport B Atlanta City Government C MARTA D Atlanta City Council
write all prime numbers from 20 to 50.​
solve it and get 50 points​
what is secured??????
Find the number of faces, edges, and vertices of this shape. Help ASAP, thanks!
Evaluate the expression. Will choose brainliest
BRAINLIST!!!!!Julius needs to determine how much information needs to be given about an isosceles triangle to be able to draw an isosceles triangle. He is looki