1,
15-(7-5x)=2x+(5-3x)
15-7+5x=2x+5-3x
6x=-3
x=-1/2
2.
5-(x-1)=3-3x
5-x+1=3-3x
2x=-3
x=-3/2
3
3-2(2x-1)=2(x-3)
3-4X+2=2X-6
11=6X
X=11/6
4
4x-3(20-x)=6x-7(9-x)
4x-60+3x=6x-63+7x
3=6x
x=1/2
够详细的了,望采纳!
1,
15-(7-5x)=2x+(5-3x)
15-7+5x=2x+5-3x
6x=-3
x=-1/2
2.
5-(x-1)=3-3x
5-x+1=3-3x
2x=-3
x=-3/2
3
3-2(2x-1)=2(x-3)
3-4X+2=2X-6
11=6X
X=11/6
4
4x-3(20-x)=6x-7(9-x)
4x-60+3x=6x-63+7x
3=6x
x=1/2
够详细的了,望采纳!