[tex]3x - 20 + 2x + 10 + x + 40 = 180[/tex]
[tex]6x + 30 = 180[/tex]
[tex]6x = 180 - 30[/tex]
[tex]6x = 150[/tex]
[tex]x = \frac{150}{6} = 25[/tex]
ángulo 2x+10=2(25)+10=60
ángulo 3x-20= 3(25)-20=55
ángulo x+40=25+40=65
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[tex]3x - 20 + 2x + 10 + x + 40 = 180[/tex]
[tex]6x + 30 = 180[/tex]
[tex]6x = 180 - 30[/tex]
[tex]6x = 150[/tex]
[tex]x = \frac{150}{6} = 25[/tex]
ángulo 2x+10=2(25)+10=60
ángulo 3x-20= 3(25)-20=55
ángulo x+40=25+40=65