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a in (-oo:+oo)
3*a+(3/5)*a+2/3 = 442/15 // - 442/15
3*a+(3/5)*a+2/3-(442/15) = 0
3*a+(3/5)*a+2/3-442/15 = 0
18/5*a-144/5 = 0 // + 144/5
18/5*a = 144/5 // : 18/5
a = 144/5/18/5
a = 8
a = 8
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