Can someone help me with these it says I need to divide?

How to solve a simultaneous equation involved with fractions?

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.