+130071 8.
The numerator is
[ xy + 4x ] / y
So we have
[ xy + 4x] / y * [ 3x] / 7 =
[ 3x^2y + 12x^2 / [ 7y] =
3x^2 [ y + 4 ]
___________
7y
9.
-2 4
___ = ____ cross-multiply
x + 4 x + 3
-2 ( x + 3) = 4(x + 4)
-2x - 6 = 4x + 16 add 2x , 6 to both sides
6x + 22 = 0
6x = -22
x = -22/6 = -11/3
