0
Anonymous
Cats have 9 lives
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cat's lives
9s + 7 = -11 9s = -18 s = -18/9 s = -2
The equivalent is 7s+2s = 9s
You have to combine equal terms. -5r-9s+9r+3s-6 = -5r+9r-9s+3s-6 = 4r-6s-6
It is five.
Nine of them