14×5-3x=25 5x-0.5×8=0 (8-1.2)x=6.8 (1-37.5%)x=62.5 9x-[1/6]=?
1个回答
展开全部
解题思路:(1)先化简,即70-3x=25,根据等式的性质,两边同加上3x,得70=25+3x,再同时减去25,得3x=45,最后再同时除以3即可;
(2)先化简,即5x-4=0,根据等式的性质,两边同加上4,得5x=4,两边再同除以5即可;
(3)先化简,即6.8x=6.8,根据等式的性质,两边同除以6.8即可;
(4)先化简,即0.625x=62.5,根据等式的性质,两边同除以0.625即可;
(5)根据等式的性质,两边同加上[1/6],得9x=1,两边再同除以9即可;
(6)根据等式的性质,两边同加上5%,得[3/4]x=17.45,两边再同除以[3/4]即可.
(1)14×5-3x=25,70-3x=25,
70-3x+3x=25+3x,
3x+25=70,
3x+25-25=70-25,
3x=45,
3x÷3=45÷3,
x=15;
(2)5x-0.5×8=0,
5x-4=0,
5x-4+4=0+4,
5x=4,
5x÷5=4÷5,
x=0.8,
(3)(8-1.2)x=6.8,
6.8x=6.8,
6.8x÷6.8=6.8÷6.8,
x=1;
(4)(1-37.5%)x=62.5,
0.625x=62.5,
0.625x÷0.625=62.5÷0.625,
x=100;
(5)9x-[1/6]=[5/6],
9x-[1/6]+[1/6]=[5/6]+[1/6],
9x=1,
9x÷9=1÷9,
x=[1/9];
(6)[3/4]x-5%=17.5,
[3/4]x-5%+5%=17.5-5%,
[3/4]x=17.45;
[3/4]x÷[3/4]=17.45÷
3
4,
x=[349/15].
,5,3x=14×5-25=45
x=45÷3=15,2,3x=14*5-25,x=45/3=15,1,14×5-3x=25 5x-0.5×8=0 (8-1.2)x=6.8 (1-37.5%)x=62.5 9x-[1/6]=[5/6] [3/4]x-5%=17.5.
(2)先化简,即5x-4=0,根据等式的性质,两边同加上4,得5x=4,两边再同除以5即可;
(3)先化简,即6.8x=6.8,根据等式的性质,两边同除以6.8即可;
(4)先化简,即0.625x=62.5,根据等式的性质,两边同除以0.625即可;
(5)根据等式的性质,两边同加上[1/6],得9x=1,两边再同除以9即可;
(6)根据等式的性质,两边同加上5%,得[3/4]x=17.45,两边再同除以[3/4]即可.
(1)14×5-3x=25,70-3x=25,
70-3x+3x=25+3x,
3x+25=70,
3x+25-25=70-25,
3x=45,
3x÷3=45÷3,
x=15;
(2)5x-0.5×8=0,
5x-4=0,
5x-4+4=0+4,
5x=4,
5x÷5=4÷5,
x=0.8,
(3)(8-1.2)x=6.8,
6.8x=6.8,
6.8x÷6.8=6.8÷6.8,
x=1;
(4)(1-37.5%)x=62.5,
0.625x=62.5,
0.625x÷0.625=62.5÷0.625,
x=100;
(5)9x-[1/6]=[5/6],
9x-[1/6]+[1/6]=[5/6]+[1/6],
9x=1,
9x÷9=1÷9,
x=[1/9];
(6)[3/4]x-5%=17.5,
[3/4]x-5%+5%=17.5-5%,
[3/4]x=17.45;
[3/4]x÷[3/4]=17.45÷
3
4,
x=[349/15].
,5,3x=14×5-25=45
x=45÷3=15,2,3x=14*5-25,x=45/3=15,1,14×5-3x=25 5x-0.5×8=0 (8-1.2)x=6.8 (1-37.5%)x=62.5 9x-[1/6]=[5/6] [3/4]x-5%=17.5.
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询