Answer:
$6
Step-by-step explanation:

Are you graphing or trying to find the answer
First add the biggest number like thousand together and the go in to the last numbers
X the first account interest = x/100*2 = 2x/100
(x + 800)/100 * 4 =( 4x + 3200)/100
2x/100 + (4x + 3200)/100 = 92
2x + 4x + 3200 = 9200
6x = 6000
x = 1000
C is the answer
Boa tarde! 1287 x 6 = 7722 Unidades
Ou 77 Centenas e 22 Unidades Espero que eu tenha lhe ajudado!