Process of substitution
y=2x-4
4x+5y=22

x = 3 and y = 2

Step-by-step explanation:

from the equations , we are going to say let

y=2x-4 equation 1

4x+5y=22 equation 2

put the value of y = 2x -4 in equation 1 into equation 2

4x+5y=22 equation 2

4x + 5( 2x -4) = 22

4x + 10x - 20 = 22

14x - 20 = 22

14x = 22 + 20

14x =42

divide both sides by 14

14x/14 = 42/14

x = 3

put the value of x = 3 in equation 1

y=2x-4 equation 1

y = 2(3) - 4

y = 6 - 4

y = 2

therefore using substitution methods the value of x = 3 and y = 2 respectively

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.

1

x = 1

step-by-step explanation:

0 ÷ x = 0

0 ÷ 1 = 0