8.
точка P = -2 1/7
точка Q = -1 5/7
точка R = 2 4/7
9. -7/5 + 18/35 × 1 22/27 + 4 ÷ 6 2/13
-7/5 + 18/35 × 49/27 + 4 ÷ 80/13
-7/5 + 6/5 × 7/9 + 1 × 13/20
-7/5 + 42/45 + 13/20
- 252/180 + 168/180 + 117/180 = 33/180 = 11/60
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8.
точка P = -2 1/7
точка Q = -1 5/7
точка R = 2 4/7
9. -7/5 + 18/35 × 1 22/27 + 4 ÷ 6 2/13
-7/5 + 18/35 × 49/27 + 4 ÷ 80/13
-7/5 + 6/5 × 7/9 + 1 × 13/20
-7/5 + 42/45 + 13/20
- 252/180 + 168/180 + 117/180 = 33/180 = 11/60