Brainliest + points
what is bond investment?

A bond investment  is a fixed income instrument that represents a loan made by an investor to a borrower (typically corporate or governmental). ... Bond investments are used by companies, municipalities, states, and sovereign governments to finance projects and operations. Owners of bonds are debt holders, or creditors, of the issuer.

x=3

step-by-step explanation:

this is really simple i saw that there was only one term (5x) and thought if that was 15 what would i have to multiply everything else to get it there? well if 5x became 15 then x would have to be 3 so plug the 3 in the x for the other equations and you get 15 for the other ones. so there you go. : )