Respuesta :

x + 45 = 76

Isolate the x, what you do to one side, you do to the other, because there is a equal sign

x + 45 (-45) = 76 (-45)

x = 76 - 45

x = 31

31 is your answer

hope this helps
Astute
Your correct answer would be 31

31+45=76

~Jurgen