An element with mass 730 grams decays by 27.6% per minute. How much of the element is remaining after 12 minutes, to the nearest 10th of a gram?

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

idk

step-by-step explanation:

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x