Resposta :
A + B=76
A - B=38
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2A = 114
A = 57
57 + B = 76
B = 76 - 57 = 19
A/B = 76/19 = 4
A - B=38
--------------
2A = 114
A = 57
57 + B = 76
B = 76 - 57 = 19
A/B = 76/19 = 4