Question

x-3y=0 and x-y=1 solve by elimination

Answer 1

The given equations are

x - y = 28 ...(i)

x - 3y = 0 ...(ii)

On subtraction, we get

2y = 28

or, y = 14

Putting y = 14 in (ii), we get

x = 3 (14) = 42

Therefore, the required solution be

x = 42, y = 14

Now, putting x = 42 and y = 14 in y = mx + 5, we get

14 = 42m + 5

or, 42m = 9

or, m = 9/42

or, m = 3/14