How much of a radioactive kind of europium will be left after 18 years if you start with 64 grams and the half-life is 9 years?

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

the solution, from the graphing of the two lines, is (3,2), i.e., x = 3, y = 2.

2/3=10/15

1/5=3/15

10+3=13/15

2 13/15 is the answer

the answer is x=45 because i said so