Answer:
15 years (180 months)
Step-by-step explanation:
turn it into months first
147
216
163
206
180
168
add them together, then divide by how many there are
1,080/6=180 months
180/12 =15
16 - 2t = t + 9 + 4t
16 - 2t = 5t + 9
-7t = -7
t = 1
Hope this helps! ;)
y = 1 - x
9x + 9y = 9 ( divide through by 9 )
x + y = 1 ( subtract x from both sides )
