[x+7y=10],[3x-2y=7]

Solve: 2x-7y=7 , 3x+y=22

If 3x+5y=15 and x-2y=10 , what is the value of 2x+7y ?

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

IF (5x-7y+10)/1=(3x+2y+1)/8=(11x+4y-10)/9 then what is x+y equal to

Solve the following system of equations by matrix method : 5x+7y+2=0 4x+6y+3=0 5x+2y=3 3x+2y=5 3x+4y-5=0 x-y+3=0 3x+y=19 3x-y=23 3x+7y=4 x+2y=-1 3x+y=7 5x+3y=12

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

Classify the following pairs of lines as coincident, parallel, perpendicular or intersecting : (i) 6x+14y-16=0 , 12x+28y-32=0 (ii) 3x-4y=8 , 3x+4y=11 (iii) 5x-2y=7 , 2y-5x=-7 (iv) 4x+7y=19 , 7x-4y=-2 (v) x-2y=7 , 4y-2x=13

If [(x+y,x-y),(7,6)] = [(10,2),(7,z)] then x, y, z are ………… .

3x+2y=5 2x-3y=7