Algebra
posted by Daniel .
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

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