Answer: 500
Explanation:
At equilibrium, it should be noted that,
Y = C + I + G
where ,
C = Consumption = 20 + 0.7(Y - T)
I = Investment = 100
G = Government expenditure = 100
Y = C + I + G
Y = 20 + 0.7(Y - 100) + 100 + 100
Y = 20 + 0.7Y - 70 + 200
Y - 0.7Y = 150
0.3Y = 150
Y = 150/0.3
Y = 500