Answer:
9.818 years after 2008
Explanation:
Y_A = 0.35 * X + 9.6
Y_B = 0.9 * X + 6.5
Equal in year X = (Y_B - Y_A) / (0.35 - 0.9) = (6.5 - 9.6) / (-0.55) = 9.818 years after 2008
X = 9.818 + 2008 = 2018.818
Y_A = 0.35 * (2018 - 2008) + 9.6 = 14.3 billion
Y_B = 0.9 * (2018 - 2008) + 6.5 = 15.3 billion