Respuesta:
5 + x = 15
x = 15-5
x = 10
Rpta: b)10
2-x=x-8
2x=8+2
2x= 10
x= 10÷2
x=5
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Respuesta:
5 + x = 15
x = 15-5
x = 10
Rpta: b)10
2-x=x-8
2x=8+2
2x= 10
x= 10÷2
x=5