解方程2(0.4x+4)-5(0.3x-7)=9 3/4[4/3(1/2x-1/4)-8]=3/2x (3x-2)/5+
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解方程2(0.4x+4)-5(0.3x-7)=9 3/4[4/3(1/2x-1/4)-8]=3/2x (3x-2)/5+2=-(x+6)/5
2(0.4x+4)-5(0.3x-7)=9
0.8x+8-1.5x+35=9
0.8x-1.5x=9-8-35
-0.7x=-34
x=340/7
3/4[4/3(1/2x-1/4)-8]=3/2x
1/2x-1/4-6=3/2x
1/2x-3/2x=6+1/4
-x=25/4
x=-25/4
(3x-2)/5+2=-(x+6)/5
3x-2+10=-x-6
3x+x=-6+2-10
4x=-14
x=-7/2
0.8x+8-1.5x+35=9
0.8x-1.5x=9-8-35
-0.7x=-34
x=340/7
3/4[4/3(1/2x-1/4)-8]=3/2x
1/2x-1/4-6=3/2x
1/2x-3/2x=6+1/4
-x=25/4
x=-25/4
(3x-2)/5+2=-(x+6)/5
3x-2+10=-x-6
3x+x=-6+2-10
4x=-14
x=-7/2
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|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|