Resposta :
C1 - C2 = 200 ==> C1 = 200 + C2 ==> C1 = 200+ 400 ==> C1 = 600
J1 = C1.0,2.7 = 1,4C1
J2 = C2.0,3.7 = 2,1C2
J1 = J2
1,4C1 = 2,1C2
1,4(200 + C2) = 2,1C2
280 + 1,4C2 = 2,1C2
2,1C2 - 1,4C2 = 280
0,7C2 = 280
C2 = 400
O menor capital é de R$ 400