Respuesta:
5.(1+x)-7=28
5+5x-7=28
5+5x=28+7
5x=35-5
x=30:5
x=6
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Respuesta:
5.(1+x)-7=28
5+5x-7=28
5+5x=28+7
5x=35-5
x=30:5
x=6