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y in (-oo:+oo)
2*(16/5-((2/5)*y))-(3*y) = 13 // - 13
2*(16/5-((2/5)*y))-(3*y)-13 = 0
2*((-2/5)*y+16/5)-3*y-13 = 0
2*(16/5-2/5*y)-3*y-13 = 0
2*(16/5-2/5*y)-3*y-13 = 0
32/5-19/5*y-13 = 0
-19/5*y-33/5 = 0
-19/5*y-33/5 = 0
-19/5*y-33/5 = 0 // + 33/5
-19/5*y = 33/5 // : -19/5
y = 33/5/(-19/5)
y = -33/19
y = -33/19
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