Susan went online and discovered that her full monthly retirement benefit at age 67 would be $2,365.00. She needed an additional $1,635 per month to live at 80% of her pre-retirement income. What was Susan's yearly pre-retirement income?

a is the correct

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

(3x-8) or (3x+8)

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!