Explicación paso a paso:
perímetro =77
2(3x)+x=77
6x+x=77
7x=77
x=77/7
x=11
base = 11
lados iguales 3*11 =33
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Explicación paso a paso:
perímetro =77
2(3x)+x=77
6x+x=77
7x=77
x=77/7
x=11
base = 11
lados iguales 3*11 =33