Dr. Trekcir has $875 to invest. he invests some of it in account#1 paying 8% annual interest and the rest of it in account#2 paying 4% annual interest. After 1 year total interest is $49.00. find hou much is invested in each account

Here's what the equation would look like (I'm using the variable n for the investments):

0.08n + 0.04 (875-n) = 49

Multiply both sides by 100:

8n + 3500 - 4n = 4900

Simplify:

4n+3500=4900

Isolate n:

4n = 1400

n = 350

8% invested: 350

4% invested: 525