多項式及公式既問題

1.
m=2n+3/X
xm=x(2n+3/x)
xm=2nx+3
x=(2nx+3)/m
2.
y=5x-1/2-x
y+1/2=5x-x
y+1/2=4x
y/4+1/8=x
2y/8+1/8=x
x=(2y+1)/8

1.令X成為公式m=2n+3/x的主項。
我估你條問題應該係 m = (2n + 3) / x
咁 x = (2n + 3) / m

2.令X成為公式y=5x-1/2-x的主項。
我估你條問題應該係 y=(5x-1)/(2-x)
咁 (2 - x)y = 5x -1
2y - xy = 5x -1
5x + xy = 2y + 1
(5+y)x = 2y + 1
x = (2y + 1)/(5 + y)