Ola Nina
10 = A*100/280
A = 10*280/100 = 2800/100 = 28
pronto
10=100A/280
280*10=100A
2800=100A
A=2800/100
A=28
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Ola Nina
10 = A*100/280
A = 10*280/100 = 2800/100 = 28
pronto
10=100A/280
280*10=100A
2800=100A
A=2800/100
A=28