Find the equation of the line . use exact numbers

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

What is the anwers for 9+2x=5x-3-x

What is the point slope form of a line with slope -5 that contains point (2,-1)