Question

21. 7x - 2y = 1
2y = x-1​

Answer 1

x = 0

y =
`-(1)/(2)`

Explanation:

Given the two equations:

7x - 2y = 1

2y = x - 1

We need to find the value of x and y.

First, let's make x the subject of the 2nd equation:

2y = x - 1

x = 2y + 1

Now, we substitute this into the first equation and solve for y:

7x - 2y = 1

7(2y + 1) - 2y = 1

14y + 7 - 2y = 1

12y = -6

y = -6/12 = -1/2

Now, putting the value of y into 2nd equation, we can solve for x:

x = 2y + 1

x = 2(-1/2) + 1

x = 0

Thus, the value of x and y are:

x = 0

y =
`-(1)/(2)`