Posted by Daniel on .
Solve for x: h=(k/4)(x3L)
Solve for B: v6Bxk=7B
Solve for S: z+(1/7)sk=(1/6)yk^2
Solve for x: 3F=10hx+10hv+10xv

Algebra 
Steve,
all these are basically the same, so I'll do one for you. If you get stuck on the others, come on back and show ehere you get stuck.
z+(1/7)sk = (1/6)yk^2
(1/7)sk = (1/6)yk^2z
(k/7)s = (1/6)yk^2z
s = (7/k)(1/6)yk^2z
s = (7/6)yk  7z/k