Explicación paso a paso:
x+40+x+120=360
2x=360-160
2x=200
x=100
60+x+140+x=360
200+2x=360
2x=160
x=80
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Explicación paso a paso:
7
x+40+x+120=360
2x=360-160
2x=200
x=100
8
60+x+140+x=360
200+2x=360
2x=160
x=80