Solve the equation below:
X-4 = -8.3 x=

Pls! does anybody know a shortcut for answering these types of questions in the future?

Me because some of question i don’t understand

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.