Can someone me with this question

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.