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Verified answer
5x - 7 + 2 = 75x - 5 = 7
5x = 7 + 5
5x = 12
x = 2 2/5 atau 2,4
5x - 5 = 7
5x = 7 + 5
5x = 12
x = 12/5
5x - 5 = -7
5x = -7 + 5
5x = -2
x = -2/5
x = {12/5 atau -2/5}