You can put this solution on YOUR website! IF these are complementary angles then:
(2x-3y)+(x+3y)=90
2x+x=90
3x=90
x=90/3
x=30 degrees.
y=0 degrees.
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IF they are suplementary angles then:
(2x-3y)+(+x+3y)=180
3x=180
x=180/3
x=60 degrees.
y=0 degrees.