c) 2x + 3x + x = 180
6x = 180
x = 30
d) 2x + 5 + x + 25 + 2x - 5 = 180
5x + 25 = 180
5x = 180 - 25
5x = 155
x = 31
e) x + x + 110 = 180 ( USE ángulos internos de 180 - 70 es 110 )
2x = 180 - 110
2x = 70
x = 35
f) 2x + 1 + 2x + 1 + 90 = 180
4x + 92 = 180
4x = 180 - 92
4x = 88
x = 22
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c) 2x + 3x + x = 180
6x = 180
x = 30
d) 2x + 5 + x + 25 + 2x - 5 = 180
5x + 25 = 180
5x = 180 - 25
5x = 155
x = 31
e) x + x + 110 = 180 ( USE ángulos internos de 180 - 70 es 110 )
2x = 180 - 110
2x = 70
x = 35
f) 2x + 1 + 2x + 1 + 90 = 180
4x + 92 = 180
4x = 180 - 92
4x = 88
x = 22