How do i find X and Y?

4y + 5z = 60
4x + 3z = 60
5x + 3y = 60

The actual width ( w) of a regulation soccer field is 90 meters (m), and the actual length is 120 meters (m). a coach has drawn a scale model of the field on a blackboard. if the longest side of his drawing is 18 cm, how long is the other side of the drawing( w)?

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4