Question

请学霸帮忙解答一下。谢谢了

Answer 1

2.
(1)
8-48x=18-33x
-15x=10
x=-2/3

(2)
0.5x+1.3x=6.5+0.7
1.8x=7.2
x=4

(3)
5(3x-6)=12x-90
15x-30=12x-90
3x=-60
x=-20

(4)
7(1-2x)=3(3x+1)-63
7-14x=9x+3-63
-23x=-67
x=67/23

3.
(1)
x-(x-1)/3=7-(x+3)/5
15x-5(x-1)=105-3(x+3)
10x+5=96-3x
13x=91
x=7
(2)
4x+5(x-1)=15(x-1)-16x
9x-5=-x-15
10x=-10
x=-1

追问

 

学霸，再帮解下这几题好嘛？