Question

solve the following pair of equation by substing method
$1).x + y = 14 \\ x - y = 4 \\ 2).3x - y = 3 \\ 9x - 3y = 9$
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Answer 1

Answer:

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Answer 2

Answer:

1) x + y = 14

x = 14 - y —(I)

x - y = 4 — (II)

from equation 1

(14-y) - y = 4

14-2y=4

-2y = 4-14

-2y = -10

y = -10/-2

y= 5

putting y value in equation 1

x = 14 - 5

X = 9

2) 3x - y = 3

X = 3 + y/3 — (I)

9x - 3y = 9

from equation 1

9(3+y/3) - 3y = 9

27 + 9y/3 - 3y = 9

27+9y-9y/3= 9

9= 9

Since here is y = 0 so there is no real roots or zeroes of the given equation

Step-by-step explanation:

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