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3*x+2*x-9 = -38/7 // + -38/7
3*x+2*x-(-38/7)-9 = 0
3*x+2*x+38/7-9 = 0
5*x-25/7 = 0 // + 25/7
5*x = 25/7 // : 5
x = 25/7/5
x = 5/7
x = 5/7
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