Question

A x 4 = E
B ÷ 4 = E
C + 4 = E
D - 4 = E
___________
& A + B + C + D = 100

Challenge
*what is the value of E ?*

Answer 1

A+B+C+4+D-4=100
     E/4+4E+2E=100
              25E/4=100
                     E=16