The equation is m + 14 = 81. \ \

\

According to subtraction property of equality: if a = b, then .

m + 14 14 = 81 14         (Subtract 14 from both sides)

m = 81 14                           (Additive inverse property:  14 14 = 0)

  m = 67                                     (Subtract: 81 14 = 67)

Check:

To check the solution, substitute m = 67 in original equation.

 m + 14 = 81  67 + 14 = 81       

 81 = 81                                   (Add: 67 + 14 = 81 )

Compare the values, the equation is true. The solution is m = 67.

The value of m = 67.