I appreciate all who helps this is do in a few min. According to the Food and Drug Administration, the recommended daily intake of iron is 18 mg. This is 4 less than twice the r…

Question

asked Jul 26, 2021 130k views

1 Answer

Philippe Grondier · Answer 1 · 2021-08-01T11:16:47+0000

Greetings from Brasil...

Let's do

Fe = iron

Z = zinc

(remembering the periodic table)

According to the question of the statement:

Fe = 18

and

"... intake of iron is 18 This is 4 less than twice the recommended daily intake of zinc..."

That is, 18 of Fe is double that of zinc minus 4 units

Writing this situation mathematically:

Fe = 2 · Z - 4

18 = 2Z - 4

18 + 4 = 2Z

22 = 2Z

22/2 = Z