The two equations that represent the total number of tubes of paint the teacher bought are:
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6 × 17 = 102 (This equation correctly calculates the total number of tubes by multiplying the number of packs by the number of tubes per pack.)
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17 + 17 + 17 + 17 + 17 + 17 = 102 (This equation also correctly adds the number of tubes in each pack to find the total amount.)
The other equations do not correctly represent the total number of tubes of paint purchased.