Răspuns :
x + 7 = x : 5 - 14 = 6 =>
x + 7 = x : 5 = 14 + 6 =>
x + 7 = x : 5 = 20 =>
x + 7 = 20 * 5 =>
x + 7 = 100 =>
x = 100 - 7 =>
x = 93