Need help please with combinding two equations

[PhysicsApprentice]

could somebody please help me

the two equations are

Vb -0.5FAC = 10
Hb -0.866FAC = -2


some how by combinding these two equations give the answer

1.732Vb - Hb = 19.32


Could somebody please explain to me how this is so?

 

[sdekivit]

could somebody please help me

the two equations are

Vb -0.5FAC = 10
Hb -0.866FAC = -2


some how by combinding these two equations give the answer

1.732Vb - Hb = 19.32


Could somebody please explain to me how this is so?

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