Respuesta :

Allrounder30

Answer:

  • option (a) x + 18 = 90

Step-by-step explanation:

Which number we have added to 18 to get 90 and we have LHS = RHS

First of all make the equation :

unknown number added to 18 we get 90

  • x + 18 = 90
  • x = 90 - 18
  • x = 72

Put 72 in the variable of x

  • 72 + 18 = 90
  • 90 = 90

Therefore, LHS = RHS.