Bonsoir
9 (9x + 6) + 3x + 5
= 9 (9 * 1/7 + 6) + 3 * 1/7 + 5
= 9 (9/7 + 6) + 3/7 + 5
= 81/7 + 54 + 3/7 + 5
= 81/7 + 3/7 + 59
= 84/7 + 413/7
= 497/7
= (7 x 71) / (7 x 1)
= 71.