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nata0808 [166]
3 years ago
5

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

Mathematics
2 answers:
Dima020 [189]3 years ago
6 0

Answer:

X=3

Step-by-step explanation:

Galina-37 [17]3 years ago
5 0

Answer:

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

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