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y in (-oo:+oo)
7 = y/22.4 // - y/22.4
7-(y/22.4) = 0
7-0.04464286*y = 0
7-0.04464286*y = 0 // - 7
-0.04464286*y = -7 // : -0.04464286
y = -7/(-0.04464286)
y = 156.79998996
y = 156.79998996
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