Solve the Equation Using the Addition Principle $$x + \frac { 7 } { 9 } = \frac { 8 } { 9 }$$

Multiple Choice

Solve the equation using the addition principle.
- $$x + \frac { 7 } { 9 } = \frac { 8 } { 9 }$$

A) 1
B) $\frac { 5 } { 3 }$
C) $\frac { 1 } { 9 }$
D) $\frac { 7 } { 9 }$