Respuesta:
x = 8
Explicación paso a paso:
AD = 20
CD = 4
AC = AD - CD
AC = 20 - 4
AC = 16
AB =BC
AB + BC = CD
x + x = 16
2x = 16
x = 16/2
Comprobamos respuesta
AB + BC + CD = 20
x + x + 4 = 20
8 + 8 + 4 = 20
20 = 20
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Respuesta:
x = 8
Explicación paso a paso:
AD = 20
CD = 4
AC = AD - CD
AC = 20 - 4
AC = 16
AB =BC
AB + BC = CD
x + x = 16
2x = 16
x = 16/2
x = 8
Comprobamos respuesta
AB + BC + CD = 20
x + x + 4 = 20
8 + 8 + 4 = 20
20 = 20