Question

AJUDA AI PESSOAL RAPIDÃO??

Answer 1

Olá Cristopher

0.2 = 1/5

(4/3)/(1/5) = (3/5 - a/7)/(1/4)

20/3 = 12/5 - 4a/7 

mmc(3,5,7) = 105 

20*35 = 12*21 - 15*4a

700 = 252 - 60a

60a = 252 - 700

a = (252 - 700)/60 = -448/60 = -112/15 

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