Get into J = (1 Viewer)
- Thread starter bluboy22
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Yeah j as the subject and it is part of the fraction.can u be more specific about wat u want? did u want to make j the subject? also is j part of the fraction?
Q/p = s/(p-j)
j= ?
cross multiply and u get
Qp - Qj = sp
Qj = Qp - sp
j = (Qp - sp)/Q
Okay I have no idea what cross multiply is, is there another method you can answer it?
cross multiply is where u get the bottom of each fraction and move it over to the top of the other fraction. if u still dont get it
multiply both sides by (p -j)
Q(p-j)/p =s
(Qp - Qj)/p = s
multiply both sides by p
Qp - Qj = sp
and u end up with wat i got before
multiply both sides by (p -j)
Q(p-j)/p =s
(Qp - Qj)/p = s
multiply both sides by p
Qp - Qj = sp
and u end up with wat i got before
(Q/P)=S/(P-J)Q/p = s/p-j
P-J is dividing on the RHS. So if we take it to LHS then we must multiply it:
(Q/P) x (P-J)=S
(Q/P) is multiplying on the LHS. If we take it to the RHS we must divide it:
(P-J)=S/(Q/P)
P-J= (S/1) x (P/Q)
P-J= (S x P)/(Q x 1)
P-J= SP/Q
P is positive (adding) on the LHS. If we take it to the RHS we must make it negative (subtract):
-J= (SP/Q)-P
If we mulitply the LHS by -1 then we must do the same to the RHS:
-J x -1 = -1 x (SP/Q)-P
J= -[(SP/Q)-P]
J=-(SP/Q)+P
J=P-(SP/Q)
Last edited:
Q/p = s/(p-j)Q/p = s/p-j
So p/Q = (p-j)/s
So p-j = ps/Q
So j = p- ps/Q