$360 installed, $280 uninstalled (both of these with pad)
tripled
the average pH of the human mouth is 6.35-6.85.
There are lots of ways to do this, but here's one:(99 - 9) / 9 = 10By the way, you probably mean "expression" rather than "equation." The equation includes both sides of the equals sign, so it isn't written only with 9's.
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1 meter = 10 decimeter = 100 centimeter = 1000 millimeter