Write in standard form two hundred seventy -nine and eight hunderd seventy- six thousand

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!

the answer is a. 72. but i cant answer with less than 20 characters so here's some random text talking about it.