Which two digits and signs can be interchanged so as to balance the given equation?
407 - 102 + 128 X 5 ÷ 58 = 545
407 - 102 + 128 X 5 ÷ 58 = 545 407 ÷ 58 + 128 X 5 - 102 = 545 7 + 128 X 5 - 102 = 545 7 + 640 – 102 = 545 545 = 545
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