Let n = 30
We are actually looking for a_30.
a_30 = 4(30) + 1
a_30 = 120 + 1
a_30 = 121
3x - 6y = -2
-6y = -3x - 2, divide through by -1
6y = 3x + 2, divide through by 6
y = 3x/6 + 2/6
y = x/2 + 1/3
F(3)=2(3) -1
f(3)= 6 - 1
f(3)=5
X = 40/30 × 7
x = 280/30
x = 28/3
