०39.8. а) $$ \left\{\begin{array}{l}3 x+7 y=46 \ 4 x-3 y=12\end{array} ight. $$ б) $$ \left\{\begin{array}{l}-3 x+4 y=24 \ 5 x+3 y=-40\end{array} ight. $$ ०39.9. а) $$ \left\{\begin{array}{l}4 x+5 y=1, \ 5 x+7 y=5 ;\end{array} ight. $$ б) $$ \left\{\begin{array}{l}3 x-5 y=25 \ 4 x-3 y=37\end{array} ight. $$ о39.10. а) $$ \left\{\begin{array}{l}4 x+15 y=-42 \ -6 x+25 y=-32\end{array} ight. $$ б) $$ \left\{\begin{array}{l}9 x+8 y=-53 \ 15 x+12 y=-27\end{array} ight. $$

Question

०39.8. а) $$ \left\{\begin{array}{l}3 x+7 y=46 \ 4 x-3 y=12\end{array}ight. $$ б) $$ \left\{\begin{array}{l}-3 x+4 y=24 \ 5 x+3 y=-40\end{array}ight. $$ ०39.9. а) $$ \left\{\begin{array}{l}4 x+5 y=1, \ 5 x+7 y=5 ;\end{array}ight. $$ б) $$ \left\{\begin{array}{l}3 x-5 y=25 \ 4 x-3 y=37\end{array}ight. $$ о39.10. а) $$ \left\{\begin{array}{l}4 x+15 y=-42 \ -6 x+25 y=-32\end{array}ight. $$ б) $$ \left\{\begin{array}{l}9 x+8 y=-53 \ 15 x+12 y=-27\end{array}ight. $$

Coles Pollard · Accepted Answer

### 039.8 а) $$x = 6, y = 4$$ б) $$x = -8, y = 0$$ ### 039.9 а) $$x = -6, y = 5$$ б) $$x = 10, y = 1$$ ### 039.10 а) $$x = -3, y = -2$$ б) $$x = 35, y = -46$$

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