Solve:x+y=7xy2x−3y=−xy
Solve for x and y using substitution method: 12x−1y=−1 1x+12y=8 (Given: x≠0 and y≠0)
1/3y+ y + 1/3x-y=3/4
1/2(3x+y)-1/2(3x-y)=-1/8
Solve for x and y
Factorise: 1−16(x−2y)2.