Dayshon begins with five pennies in his piggy bank on day 1. Pennies are added to his bank every day,resulting in the following geometric sequence:5,15,45,135... This pattern continues for 7 days. How many pennies will he have at the end of day 7?

-6x + 6y = 6
-6x + 3y = -12

✨ You need to eliminate a variable, so I'll use -1 to multiply the first equation by.

6x - 6y = -6
-6x + 3y = -12

-3y = -18

✨ y = 6

6x - 36 = -6

6x = 30

✨ x = 5

✨ The solution is (5,6) ✨

∘∘∘∘∘∘∘∘∘∘∘∘∘∘∘∘∘∘∘∘∘

♡´･ᴗ･`♡вяαιиℓιєѕт ρℓєαѕє♡´･ᴗ･`♡