问题 解答题

解下列方程:

(1)6(3x-2)-4(4x-3)=1-8x;

(2)4(x-2)+20x-4=5(1-2x);

(3)x÷(144÷9)=0.0625;

(4)1.6÷(x-0.45)=5;

(5)35(x-2)-15(5x-6)=(22x-63)-21(3x-4).

答案

解;(1)6(3x-2)-4(4x-3)=1-8x,

18x-12-16x+12=1-8x,

18x-16x+8x=0,

10x=1,

x=1÷10,

x=

1
10

(2)4(x-2)+20x-4=5(1-2x),

4x-8+20x-4=5-10x,

24x+10x=5+12,

34x=17,

x=17÷34,

x=

1
2

(3)x÷(144÷9)=0.0625,

x÷16=0.0625,

x=0.0625×16,

x=1;

(4)1.6÷(x-0.45)=5,

x-0.45=1.6÷5,

x-0.45=0.32,

x=0.32+0.45,

x=0.77;

(5)35(x-2)-15(5x-6)=(22x-63)-21(3x-4),

35x-70-75x+90=22x-63-63x+84,

-40x+20=-41x+21,

-40x+41x=21-20,

x=1.

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