Well,
1/5 of 1200 is 240
Then, you subtract 240 by 1200
So, you get $960
Notice that

That is, the <em>n</em>-th term (where <em>n</em> = -1, 0, 1, …, 9) in the sum on the left side has a partial fraction decomposition of

and in the sum, some adjacent terms will cancel and leave you with

Now solve for <em>x</em>, bearing in mind that we cannot have <em>x</em> = 0, -1, -2, …, -10 :

Combine the fractions on the left side:

Then we must have

so that either <em>x</em> = 2 or <em>x</em> = -11.
5022 ÷ 18 = 279
your tell you mom to collect 279
Bonnie would need to mix 1.5mL of soy sauce for every 1mL of vinegar
Bonnie would need to mix 2/3mL of vinegar for every 1mL of soy Sauce