1) 9/7 k + 4/9 = -8 - 3/8 k k=?

Question

2)a x + b = c x + d x=?

Answer 1

Q1:
((-8) - (4 / 9)) / ((9 / 7) + (3 / 8)) = -5.08482676 = k

Q2: x = - (b-d)/(a-c)