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7*x+2/5 = 197/55 // - 197/55
7*x+2/5-(197/55) = 0
7*x+2/5-197/55 = 0
7*x-35/11 = 0 // + 35/11
7*x = 35/11 // : 7
x = 35/11/7
x = 5/11
x = 5/11
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