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A:
18.4=
B:
9*6=
C:
9*12=
D:
9*120=216*x
Despejare x:
A:
X*18.4=218
X=
X=11.84
B:
X*54=216
X=
X=4
C:
X*108=216
X=
X=2
D:
X*216=1080
X=
X=5