Answer:

To find the value of a in the equation X + 7y = 4, we need to substitute the given value of y = 8 into the equation and solve for X.

Given: y = 8

Substituting y = 8 into the equation X + 7y = 4:

X + 7(8) = 4

X + 56 = 4

Next, we can isolate X by subtracting 56 from both sides of the equation:

X = 4 - 56

X = -52

Now, we have the values X = -52 and y = 8. To find the value of a, we can substitute these values into the equation a = X + 2y:

a = (-52) + 2(8)

a = -52 + 16

a = -36

Therefore, the value of a is -36.

Verified answer

Answer:

Consider the given equation,

2x−ky+l7l=8

and x=2,y=1

Now, put these value of x and y in given equation,

2×2−k×

1=84−k=8k=4−8k=−4

Hence, this is the answer.

Step-by-step explanation:

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