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a in (-oo:+oo)
-9.8 = a/(-2.3) // - a/(-2.3)
-(a/(-2.3))-9.8 = 0
0.43478261*a-9.8 = 0
0.43478261*a-9.8 = 0 // + 9.8
0.43478261*a = 9.8 // : 0.43478261
a = 9.8/0.43478261
a = 22.53999993
a = 22.53999993
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