I do not understand what I did wrong on 2D? Looking for feedback

Voice 2C Suppose the Government imposed an $2 tax on Good X. Suppliers are responsible for collecting and remitting the tax to the government. Adjust the supply equation to reflect the tax, and solve for equilibrium market price and quantity exchanged. Illustrate the effect of this tax in your 2B diagram. Supply function w/ tax : Q=- 20+ 6.56p-t) equi. price: (75-3P) = (- 20+ 6. 5 (pt ) ) LD P= 0. (8(t+ 14.62) t = 2 p: 11 37 eau aty . Q =- 20+ 6.5 (11:37-2) a = 40. 90 5 2D Calculate the total amount of tax collected. Tax Before Tax After 10 x 45= $450 11:37x 40. 905 = $ 46 5.09 465.09-450 =$15. 09