If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u in (-oo:+oo)
7 = u/17.92 // - u/17.92
7-(u/17.92) = 0
7-0.05580357*u = 0
7-0.05580357*u = 0 // - 7
-0.05580357*u = -7 // : -0.05580357
u = -7/(-0.05580357)
u = 125.44000321
u = 125.44000321
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