Solve the system of equations
3x-3y=4
-3x+3y=3

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Im so bad at fractions they are not my best math thing to work on