Respuesta:
3-
x+25=81
x+25-25=81-25
x=56
2-
x+20=10
x+20-20=10-20
x=-10
8-
x-10-4x=10
x-x
10-4=6
x-6+6=10+6
1 x= 16
2-x= 6
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Respuesta:
3-
x+25=81
x+25-25=81-25
x=56
2-
x+20=10
x+20-20=10-20
x=-10
8-
x-10-4x=10
x-x
10-4=6
x-6+6=10+6
1 x= 16
2-x= 6