Peter invested $550in insurance and stocks. he put $100 more in the insurance than he put into stocks. how much did he invest in each?

Let be x - Peter invested into stocks, then x+100 - Peter invested in the insurance.

Equation is:

x+x+100=550

2x+100=550

2x=550-100

2x=450

x=$225 - Peter invested into stocks.

225+100=$325 - Peter invested in the unsurance.