Question

ok last one -2(6+s) greater than than or equal to -15-2s

Answer 1

-2(6+s) >= -15 -2s
first multiply -2 to 6 and s
-12 -2s >= -15 -2s
and solve it from there.

Answer 2

Use the distributive property on -2(6+s). Then set each side equal to zero and solve =)