Question

4xy+(8xy-7xy)+4(x+7xy)+6×(-2+8xy) = 81xy + 8x

Answer 1

4xy + xy + 4x + 28xy - 12 + 48xy = 81xy + 8x
5xy + 28xy + 48xy - 81xy + 4x -8x = +12
33xy - 33xy - 4x = 12
-4x= 12
x =
$\frac{12}{ - 4}$
x= - 3