Question

If x=2k-2 and y=k+1 is a solution of equation 2x-y=4 then find the value of k

Answer 1

Answer:

Put the values of x and y in 2x-y=4

2(2k-2)-(k+1)=4

4k-4-k-1=4

3k-5=5

3k=10

k=10/3

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Answer 2

Step-by-step explanation:

x=2k-2___(1)

y=k+1___(2)

2x-y=4___(3)

from eq.(2)

y=k+1

k=y-1___(4)

now,put eq.(4) in eq(1)

x=2(y-1)-2

x=2y-2-2

x=2y-4___(5)

now put eq(5) in eq(3)

2(2y-4)-y=4

4y-8-y=4

3y=12

{y=4}

put the value of y in eq(2)

2=k+1

[k=1]******