解两道方程题;1⼀2[x-1⼀2(x+1)]=2⼀3 (x-1) 1⼀3(x-1)+1⼀4(x-1)-1⼀2(x-1)=1

2024-12-20 06:06:00
推荐回答(1个)
回答1:

1/2[x-1/2(x+1)]=2/3 (x-1)
1/2[x-1/2x-1/2)]=2/3 (x-1)
1/4[x-1]=2/3 (x-1)
1/4[x-1]-2/3 (x-1)=0
(1/4-2/3)[x-1]=0
x-1=0
x=1

1/3(x-1)+1/4(x-1)-1/2(x-1)=1
(1/3+1/4-1/2)(x-1)=1
1/12 (x-1)=1
x-1=12
x=13