1 | p | ( | 1 | − | 5 100 | ) | − | ( | 100 | + | 90 | ) | = | 0 |
Left side of the equation = | 1 | p | × | 1 | − | 1 | p | × | 5 100 | − | ( | 100 | + | 90 | ) |
= | 1 | p | − | 1 20 | p | − | ( | 100 | + | 90 | ) |
= | 19 20 | p | − | ( | 100 | + | 90 | ) |
= | 19 20 | p | − | 100 | − | 90 |
= | 19 20 | p | − | 190 |
19 20 | p | − | 190 | = | 0 |
19 20 | p | = | 0 | + | 190 |
19 20 | p | = | 190 |
p | = | 190 | ÷ | 19 20 |
= | 190 | × | 20 19 |
= | 10 | × | 20 |
p | = | 200 |