12/x+4=84/49?

Question

I have a homework problem. Am I suppose to divide, or multiply the 12? (Yes, I know it would be multiplying either way)! Help!! {:0

Answer 1

(12/x) +4 =(84/49)

(12/x)=(84/49) -4

.....=(84 -196)/4 =-(112/4)

12=-(112/4)x

x=-12/(112/4)

x=-12*(4/112)  =-48/112

x=-0.4285714

or x=-3/7