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a in (-oo:+oo)
4*a-((1/2)*a)+3/8 = -277/8 // + -277/8
4*a-((1/2)*a)+3/8-(-277/8) = 0
4*a+(-1/2)*a+3/8+277/8 = 0
7/2*a+35 = 0 // - 35
7/2*a = -35 // : 7/2
a = -35/7/2
a = -10
a = -10
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