Respuesta:
x+7+x+7+x+3+x+3=180
4x+20=180
4x=160
x=40
comprobación:
47+47+43+43=180
94+86=180
180=180
:D
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Verified answer
Respuesta:
x+7+x+7+x+3+x+3=180
4x+20=180
4x=160
x=40
comprobación:
47+47+43+43=180
94+86=180
180=180
:D