Answer:
a is 2x+2x and 4x
b is 6(7y-4) and 6*7y-6*4
Element X is a radioactive isotope such that every 14 years, its mass decreases by half.
Given that the initial mass of a sample of Element X is 80 grams, how much of the
element
40x = x+4
x= (x+4)/40
x= x/40+4/40
x-x/40= 4/40
(40x-x)/40= 1/10
39x/40= 1/10
39x= 1/10*40
x= 4/39
Answer:
la repusta es 14
Step-by-step explanation:
Tú necista a ser 3+3+4+4 y es 14 la repusesta