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First, our equation is:
x 
Our first step is to simplify.
When you simplify you get 3 1/8.
This is another way you can get it: (Multiply across. )

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7 times 6 is 42
91 divided by 7 is 13
X + 20 <= -10
Subtract 20 from both sides:
X <= -30
X/5 - 11 = -13
x/5 - 11 (+11) = -13 (+11)
x/5 = -2
x/5 (5) = -2(5)
x = -10
-10 is your number
hope this helps