Is this one solution, no solution or infinitely many solutions -2x - 2y = 6

10x + 10y = -30

can someone also tell me how you can find out if the equation has no soultion? ( best explanation gets brainiest)

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