Vamos a representar el enunciado
x + 28 = 4x - 11
x - 4x = -11 - 28
-3x = - 39
3x = 39
x = 39/3
x = 13
Rosa tiene 13 años
Un saludo
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Vamos a representar el enunciado
x + 28 = 4x - 11
x - 4x = -11 - 28
-3x = - 39
3x = 39
x = 39/3
x = 13
Rosa tiene 13 años
Un saludo