Need help in Macro Economics?

Question

Need Help With Macro Econs ( Y Formula )?

if S = -100 + 0.3 Yd , I = 500, G = 250, Tx = 200, Tr = 50

Question :

a. Y eq

b. C eq

c. S eq

d. Consumption Multiplier?

e. If Consumption rise 30, what's Y now?

f. If intial spending (Y*) = 1000, what gap is happen? Inflationary or deflationary?

g. Solve the gaps that appear!

note. i've done my own calculation with this, but im afraid i've done some mistake bcause i missed the class so i tried to answer these myself. I hope there's anyone can help me answer these questions so i can evaluate my answer. sorry for the bad english

Answer 1

If S=I then Yd=400/0.3

C=0.7Yd

S=I=500