HELP I don’t understand

Show me how you find y and z and determine what y and z are you i appreciate it : )

Which expression is equivalent to -5(3x - 6/7)

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?