Respuesta :
Answer:
(-9, -9)
Step-by-step explanation:
3x + 5y = −72 and 2x + 3y = –45 is equivalent to:
3x + 5y = −72
2x + 3y = –45
Let's eliminate x. Â To do this, multiply the first equation by -2 and the second equation by +3. Â We get:
-6x - 10y = 144
6x + Â 9y = -135
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   -y = 9
So y = -9. Â Substituting -9 for y in the first equation, we get
3x + 5(-9) = -72, or
3x - 45 = -72. Â Then 3x = -27, and x = -9.
The solution to this system is (-9, -9).