2（3x-4)+7(4-x)=4x3(1.5x-3)-1.5(x+5)=3.30.6(2x-1)-0.3(x-1)=3.39.6x_数学解答

2（3x-4)+7(4-x)=4x
3(1.5x-3)-1.5(x+5)=3.3
0.6(2x-1)-0.3(x-1)=3.3
9.6x/6-12.6x/9=5.5

人气：402 ℃　时间：2020-04-08 17:53:40

解答

6x-12+14-7x=4x
6x-7x=4x+12-14
-x-4x=-2
-5x=-2
x=-2.5
3(1.5x-3)-1.5(x+5)=3.3
4.5x-9-1.5x+7.5=3.3
4.5x-1.5x=3.3+9-7.5
3x=4.8
x=1.6