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

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

What does the Strangler Fig eat and how?

Each statement is true of the Enlightenment EXCEPT: A. They provided the religious basis for representative democracy. B. They formed new ideas on monarchy and

To infer the theme of a story, one must analyze the motivations of the central character that is the focus of interest, the __________.

Earth’s rotation causes surface currents in the Northern Hemisphere to A) curve clockwise B) move in straight lines. C) curve counterclockwise. D) move in di

Why did the French become allies with the Americans? to get revenge for recent French losses in North America to gain territory in the West to protect the Iroqu

8 miles is approximately equal to 6 km. How many km are equal to 28 miles? How many miles are equal to 42 km?

why do people emigrate from central america to the united states

117 over 200 as a percent

Draw and label a quadrilateral that could not be classified as a parallelogram. Explain why it can't be classified as a parallelogram.

7 apples weighs the same as 4 oranges 5 oranges weighs the same as 6 bananas Put the fruit in order of weight least to greatest