Need fast as possible last year debra had 30,000 to invest how much do she invest each account

Answer
First account = $25,000
second account =$5,000

Explanation
The formular for simple interest is 
Interest = PRT
where P⇒money invested
           R⇒rate
           T⇒ Period (number of years)

Let x to be the money invested in the first account.
Money invested in the second account = 30,000 - x

∴ (x × 0.05×1) + ((30,000-x)×0.07×1) = 1600
0.05x+2100-0.07x = 1600
-0.02x = -500

x = -500/-0.02
   =25,000

Money invested in the first account = $25,000
Money invested in the second account = (30,000-25000) = $5000

Letter a (: : : : : : : : : :

Add up all the sides