`0.5x-7y=2 ; 3.4x-4.4y=15.4`

x+3y = -4 ; 5x-7y=68

Find the orthocentre of the triangle formed by the lines 4x-7y+10=0,x+y=5 and 7x+4y=15 .

5x+7y+2=0 4x+6y+3=0

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

Find the orthocentre of the triangle whose sides are 4x-7y+10=0,x+y=6 and 7x+4y=15

The equation of the line passing through the point of intersection of 5x-2y=12, 4x-7y-15=0 and parallel to 3x-2y+5=0 is

3x-4y=-7,5x-2y=0

Find the orthocentre of the triangle formed by 4x-7y+10=0, x+y-5=0, 7x+4y-15=0 .

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