F.1一元一次方程

做代數有分數出現就一般是超麻煩, 所以我會通分母.

2) 7/2 5/3m=11/6-5/4m
24(7/2 5/3m)=24(11/6-5/4m)
84 40m=44-30m
70m=-40
m=-4/7

3) (x 1/3) (x-1/7)=-6
21(x 1/3) 21(x-1/7)=21(-6)
21x 7 21x-3=-126
42x=-130
x=-65/21

4) 1/9(y 9) 1/2(y 7)=5/6
18(1/9y 1 1/2y 7/2)=18*(5/6)
2y 18 9y 63=15
11y=15-81
y=-74/11

5) 1/6(m-4)-1/4(2-m)=1/2
12(1/6m-2/3-1/2 1/4m)=12(1/2)
2m-8-6 3m=6
5m=20
m=4

2.
7/2+5/3m=11/6-5/4m
5/3m+5/4m=11/6-7/2
20/12m+15/12m=11/6-21/6
35/12m=-10/6
6*35=12m*(-10)
210=-120m
m=-1.75

3.
(x+1/3)+(x-1/7)=-6
2x+7/21-3/21=-6
2x=-6-4/21
x=-65/21
or
7(x+1)/21+3(x-1)/21=-6
7x+7+3x-3=-126
x=-13
唔明你問題= =
4.
2(y+9)/18+9(y+7)/18=5/6
2(y+9)+9(y+7)=15
2y+18+9y+63=15
y=-6
E個其實靠估的你個問題= =
5.
2(m-4)/12-3(2-m)/12=1/2
2m-8-6+3m=6
m=4