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m in (-oo:+oo)
m-(6/5)+3.8 = 7-(2*m) // - 7-(2*m)
m+2*m-(6/5)-7+3.8 = 0
m+2*m-6/5-7+3.8 = 0
3*m-4.4 = 0 // + 4.4
3*m = 4.4 // : 3
m = 4.4/3
m = 1.46666667
m = 1.46666667
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