[tex]a)5xy - 3x + 4xy = (5xy + 4xy) - 3x = 9xy - 3x = 3x(3y - 1)[/tex]
[tex]b)6x - 8y - 4y = 6x + ( - 8y - 4y) = 6x + ( - 12y) = 6x - 12y = 6(x - 2y)[/tex]
[tex]c)3y + 5y - 7y + x = (3y + 5y - 7y) + x = y + x[/tex]
[tex]d)8z + 3xy - 12z = (8z - 12z) + 3xy = - 4z + 3xy[/tex]
[tex]e)5m - 9n + 2n = 5m + ( - 9n + 2n) = 5m + ( - 7n) = 5m - 7n[/tex]
[tex]f)10x + 4y - y = 10x + (4y - y) = 10x + 3y[/tex]
[tex]g)6z - 4z + 2z = (6 - 4 + 2)z = 4z[/tex]
[tex]h)3x - 7y + 5x + 4y = (3x + 5x) + ( - 7y + 4y) = 8x + ( - 3y) = 8x - 3y[/tex]
