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Answer:
[tex]\left \{ {{x=\frac{4496}{3} } \atop {y=-\frac{3596}{3} }} \right.[/tex]
Step-by-step explanation:
Solve: [tex]x+y=300\\12x+15y=4\\12x+15y=4[/tex]
↓
[tex]x=\frac{4496}{3}\\y=-\frac{3596}{3}[/tex]
I hope this helps you
:)