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1.
x+y=180
x=mayor
y=menor
x=4y
4y+y=180
5y=180
y=180/5
y=36
x+36=180
x=180-36
x=144
144+36=180
2.
x+y=90
x=3y-10
3y-10+y=90
4y-10=90
4y=90+10
4y=100
y=100/4
y=25
x+25=90
x=90-25
x=65
65+25=90
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