If `[[3,-2],[-1,2]][[x],[y]]=[[11],[-5]]` then `3x+7y=`

The solutions of the linear system of [[2,2,2],[7,1,1],[0,6,5]][[x],[y],[z]]=[[3y+11],[6z-1],[5y+11]]+[[x],[x],[4z]]+[[z],[3x],[4y]] is

" The solutions of the linear system of equations "[[2,2,3],[7,1,1],[0,6,5]][[x],[y],[z]]=[[3y+11],[6z-1],[5y+11]]+[[x],[x],[4z]]+[[z],[3x],[4y]],is

The solution of the linear system of equation [[2,2,3],[7,1,1],[0,6,5]][[x],[y],[z]]=[[3y+11],[6z-1],[5y+11]]+[[x],[x],[4z]]+[[z],[3x],[4y]] has

If [2x+y,4x,5x-7 4x]=[7 7y-13 y x+6] , then the value of x+y is x=3 , y=1 (b) x=2 , y=3 (c) x=2 , y=4 (d) x=3 , y=3

5x + 2y = 31 3x + 7y = 36

Solve for x and y (i) [{:(,2,5),(,5,2):}] [{:(,x),(,y):}]=[{:(,-7),(,14):}] (ii) [x+y, x-4] [{:(,-1,-2),(,2,2):}]=[-7, -11] (iii) [{:(,-2,0),(,3,1):}] [{:(,-1),(,2x):}] +3[{:(,-2),(,1):}]=2 [{:(,y),(,3):}] .

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