解方程:(1)2y+1=5y+7;(2)2-2x?43=x?76;(3)0.1x+0.10.2-1=2?3x3.

解方程:(1)2y+1=5y+7;(2)2-2x?43=x?76;(3)0.1x+0.10.2-1=2?3x3.
2025-03-19 09:03:26
推荐回答(1个)
回答1:

(1)2y+1=5y+7,
-3y=6,
y=-2;

(2)2-
2x?4
3
=
x?7
6

12-2(2x-4)=x-7,
12-4x+8=x-7,
-5x=-27
x=5.4;

(3)
0.1x+0.1
0.2
-1=
2?3x
3

x+1
2
-1=
2?3x
3

3(x+1)-6=2(2-3x),
3x+3-6=4-6x,
9x=7,
x=
7
9