解方程或解比例. 3×0.7+4x=6.9 4:112
解方程或解比例.3×0.7+4x=6.94:112=16:x23x-17.5=0.5x2.4=150.8....
解方程或解比例. 3×0.7+4x=6.9 4:112=16:x 23x-17.5=0.5 x2.4=150.8.
展开
1个回答
展开全部
(1)3×0.7+4x=6.9,
2.1+4x-2.1=6.9-2.1,
4x=4.8,
4x÷4=4.8÷4,
x=1.2;
(2)4:
=16:x,
4x=16×
,
4x=
,
4x÷4=
÷4,
x=
;
(3)
x-17.5=0.5,
x-17.5+17.5=0.5+17.5,
x=18,
x÷
=18÷
,
x=27;
(4)
=
,
0.8x=2.4×15,
0.8x=36,
0.8x÷0.8=36÷0.8,
x=45.
2.1+4x-2.1=6.9-2.1,
4x=4.8,
4x÷4=4.8÷4,
x=1.2;
(2)4:
1 |
12 |
4x=16×
1 |
12 |
4x=
4 |
3 |
4x÷4=
4 |
3 |
x=
1 |
3 |
(3)
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
x=27;
(4)
x |
2.4 |
15 |
0.8 |
0.8x=2.4×15,
0.8x=36,
0.8x÷0.8=36÷0.8,
x=45.
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