Step 1: Combine Like terms!
You see the right side of the equation? See the -1.4? Yes! Take that number and add it to the left side to get the <em>n </em>alone. To find the answer!
You should have:
n=-4.9
Need a better explanation? Just ask and I'll make it simpler!
Answer:
a1 = 70
a2 = 100
a3 = 130
an = 70 + 30(n - 1)
9:04
Step-by-step explanation:
21 - 17 = 4
it's using subtraction
