5x-a=14 2(5x+a)=3(a-x)+12a 8:3=4x:7 2x:3=6:

5x-a=14 2(5x+a)=3(a-x)+12a 8:3=4x:7 2x:3=6:
5x-a=14 2(5x+a)=3(a-x)+12a 8:3=4x:7 2x:3=6:

5x-a=14 2(5x+a)=3(a-x)+12a 8:3=4x:7 2x:3=6:
5x-a=14
x=(a+14)/5
2(5x+a)=3(a-X)+12a
10x+2a=3a-3x+12a
13x=7a
x=7a/13
8/3=4x/7
12x=56
x=14/3
2x/3=6/5
10x=18
x=1.8

将以上式子化简为：
5x-a=14
13x-a=0
13x=a
5x-13x=14
x=-7/4
a=--91/4


x=56/12
=14/3
x=18/10
=9/5

5x-a=1413x-a=013x=a5x-13x=14 x=-7/4a=--91/4x=56/12 =14/3x=18/10 =9/5