Explicación paso a paso:
x-3=6
x=9
2x=10
2x=10/2
x=5
5x+2=7
5x=7-2
5x=5
x=5/5
x=1
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Explicación paso a paso:
x-3=6
x=9
2x=10
2x=10/2
x=5
5x+2=7
5x=7-2
5x=5
x=5/5
x=1