Answer:
Y=X+2
Step-by-step explanation:
He starts with 50 because 6x2=12 add a zero u get 120 then subtract that from 170 and you get 50
Multiply -6 by x and -6 by eight.
Ex. -7(x+2)
-7*x + -7*2
-7x -14
Answer:
n=11
Step-by-step explanation:
n/2 (2*4 + (n-1)*3) = 209
1/2 (3n^2+5n) = 209
3n^2+5n-418 = 0
(3n+38)(n-11) = 0
n=11
Hope it helps you .....