The ratio of reserves to annual production (R/P) is an indication of: The ratio of reserves to annual production (R/P) is an indication of:
how much oil each OPEC country is allowed to produce
how much energy countries are allowed to hold in reserve
the number of years the known reserves will last the price/barrel as determined by the total output around the world
the effect of non-OPEC countries on total world production

the number of years the known reserves will last

Explanation:

R/P = reserve amount of known resource existing  in an area / amount of resource tapped or extracted in one year at current rate.

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. : )

if you use only 25 for your entertainment and only 200 for the groceries that you really need and take out the 50 per month for the computer then that should be enough