just wondering how this answer was got for this question

YOU 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. 56at) equi. price : (75- 3P ) = (- 20+ 6. 5 ( p-t ) ) + LDP= 0. 68 (t+ 14.62] t = 2 p: 11 37 eau aty : Q =- 20+ 6.5 ( 11:37- 2) Q = 40. 90 5