Step-by-step explanation:
[tex]9x + 10y = 10...(1) \\ x = - 10...(2) \\ substituting \: x = - 10 \: in \: equation \: (1) \\ 9 \times ( - 10) + 10y = 10 \\ - 90 + 10y = 10 \\ 10y = 10 + 90 \\ 10y = 100 \\ y = \frac{100}{10} \\ y = 10 \\ (x, \: \: y) = ( - 10, \: \: 10)[/tex]
