幫我計主項變換ar!!

(1) P=2Q(a-b) [b]
P=2Qa-2Qb
2Qb=2Qa-P
b=(2Qa-P)/2Q

(2) m=n(a-b)+a [a]
m=na-nb+a
m=(n+1)a-nb
(n+1)a=m+nb
a=(m+nb)/(n+1)

(3) a=(3x+b)/2x [x]
2ax=3x+b
2ax-3x=b
(2a-3)x=b
x=b/(2a-3)

幫我計主項變換ar!!
有步驟先得

(1) P=2Q(a-b) [b]


(2) m=n(a-b)+a [a]

(3) a=3x+b [x]
____
2x