What is the perfect learning environment

If 3x+8=3x+8 is it one solution or no solution

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.

Can someone tell me if this is perpendicular? !