In the equation `2x+y=7`, find the values of `(i)` `y` if `x=2` and `(ii)` `x` if `y=-1`.

Find the value of x, if 2x+y=7 and y=-3

Draw the graph of the equation y=3x. Form your graph, find the value of y when (i) x=2 (ii) x=-2.

If x^2+y^2=29\ a n d\ x y=2, find the value of (i) x+y (ii) x-y

(a) Draw the graph of the equation 2y-3x=7 Also find the value of y when x=2(1)/(2) and the value of x when y=3(1)/(2) from the graph.

If 3x-7y=10\ and x y=-1, find the value of 9x^2+49 y^2

Find the value of y in the equation 2x+y=7 , if x=2 . Find x if y =-1 .

Find the value of y in the equation 2x+y=7 , if x=2 .

If x-2y =-1 , 2x-y = 7 then find the value of x-y .

If [x-y2x+y7]=[3187], then find the value of y.

If 7x+5y=-17 and 5x+7y=-19, then find the value of (i) x-y (ii) x+y.