Well this system produce infinitely many solutions -4x+6y=20, 4x-3y=-2

y = 6

x = 4

Step-by-step explanation:

to evaluate this system of equation using substitution method, we would say that let

-4x+6y=20 equation 1

4x-3y=-2 equation 2

from equation 1

-4x+6y=20 equation 1

-4x = 20 -6y

divide both sides by -4

-4x/-4 = 20- 6y/-4

x = -( 20 - 6Y)/4 EQUATION 3

Substitute the value of x  into equation 2

4x-3y=-2 equation 2

4 ( 20 - 6y)/-4  - 3y = -2

- (20 - 6y) - 3y = -2

-20 + 6y -3y = -2

collect the like terms

6y -3y = -2 + 20

3y = 18

divide both sides by the coefficient of y

3y/3 = 18/3

y = 6

substitute the value of y = 6 into equation 3

x = -( 20 - 6Y)/4 EQUATION 3

x = 20 -6(6)/-4

x = 20 - 36/-4

x = -16/-4

x = 4

therefore the value of x and y is 4 and 6 respectively.

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.