Work Step by Step
As per the statement: $x+2y=180$ and $y+3x+15=180$ Plug $x=180-2y$ in the second equation, then we get $y+3(180-2y)+15=180 \implies -5y=-375$ or, $y=75$ Now, $x+2(75)=180 \implies x=30$ Thus, $x=30,y=75$
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