Find the orthocentre of the triangle whose sides are `7x+y-10=0, x-2y+5=0, x+y+2=0`

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

Coordinates of the orthocentre of the triangle whose sides are 3x -2y = 6, 3x + 4y + 12 = 0 and 3x-8y+12=0 is