Question

初一数学题！！！！！！！！！！！！！！要过程！！！！！！！！！！！！急！！！！！！！！！！！！！！

Answer 1

(1)
4x-4=3x-3+1
4x-3x=-3+1+4
x=2

(2)
0.79x-1.21x=0.25
-0.42x=0.25
x=-25/42

Answer 2

解：4（x-1）-3(x-1)=1
x-1=1
x=2
解:(1-21%-1-21%)x=25%
-42%x=25%
x=-25/42

Answer 3

(1) 4(x-1)-3(x-1) =x-1 = 1 x =2
(2) (1 - 21%)x -(1+21%)x = 42%x = 25% x=25/42