(1)5×-2=7×+8
-10=2x
x=-5
(2)-×=-2/5×+1
-3/5x=1
x=-5/3
(3)5(×+8)-5=0
5x+40-5=0
5x=-35
x=-7
(4) 1/2(×-1)=2-1/5(x+2)
5(x-1)=20-2(x+2)
5x-5=20-2x-4
7x=21
x=3
(5)1/3(×+1)=1/7(2×-3)
7(x+1)=3(2x-3)
7x+7=6x-9
x=-16
(5)3-×/2=×+4/3
3-4/3=x+x/2
5/3=3x/2
x=10/9
若满意该答案请采纳!!谢谢
(1)5X-7X=8+2 (2)-X+(-2/5X)=1 (3)5X+40-5=0 (4)1/2x-1/2=2-1/5x-2/5 (5)两边乘6
-2X=10 -7/5x =1 5X=-35 1/2x+1/5x=2+2/5+1/2 18-3x=6x+8
x=-5 x =-7/5 X=-7 7/10x=10/29 18-8=6x+3x
x=3 10 =9x
x=10/9
唉,我数学是体育老师教的,不好意思