81=7k+19=3k solve variable. include steps, also check your answer!

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.