Related Post: 2 3 X 9 1 3 X 2 3 X 9 )= 1 3 X 27 3 2 9 X 1 3 X 7 2 X 3 6 X 2 9 1 X 3 2 3 3x 9 )- 4 1 3 9x 21 )-( X 5 3 3 X 243 2 3 X 9 1 3 2 3 4 X 1 5 9 X 3 4 3 X 1 Y =- 9 2 X 3 Y 5 By Elimination Method X 2 9 1 3 X 2x 1 3 3 X 1 Y =- 9 2 X 3 Y 5 By Substitution Method