=
6 - 5 + 1/7
= 1 + 1/7
= 8/7
7 - 2 + 2/7
= 5 + 2/7
= 37/7
4 + 5/7 - 6/7
= 4 + 4/7
= 32/7
15(7 + 2/9) + 4(5 + 5/9)
= 15(7) + 15(2/9) + 4(5) + 4(5/9)
= 105 + 30/9 + 20 + 20/9
= 105 + 10/3 + 20 + 20/9
= 145 + 50/9
= 1450/9 + 50/9
= 1500/9
= 166 2/9
=
6 - 5 + 1/7
= 1 + 1/7
= 8/7
7 - 2 + 2/7
= 5 + 2/7
= 37/7
4 + 5/7 - 6/7
= 4 + 4/7
= 32/7
15(7 + 2/9) + 4(5 + 5/9)
= 15(7) + 15(2/9) + 4(5) + 4(5/9)
= 105 + 30/9 + 20 + 20/9
= 105 + 10/3 + 20 + 20/9
= 105 + 30/9 + 20 + 20/9
= 145 + 50/9
= 1450/9 + 50/9
= 1500/9
= 166 2/9