Explicación paso a paso:
1/2x-3-3-7
1/2x-3=21
1/2x=21+3
1/2x=24
X=24: 1/2
X=48
11
3.0
Comprobación
1/2*48-3-3-7
48/2-3-21
24-3=21
21=21
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Explicación paso a paso:
1/2x-3-3-7
1/2x-3=21
1/2x=21+3
1/2x=24
X=24: 1/2
X=48
11
3.0
Comprobación
1/2*48-3-3-7
48/2-3-21
24-3=21
21=21