The sum of two numbers is 86 and their difference is 38. find the two numbers

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Consider the function f(x)=-5x+3 what is f(-2)

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20