题目内容：

7x=17.5解方程并写出验算过程

优质解答

1.5×4=
2.5×4 =
0.13× 4=
2.4-0.8=
4.2×1000=
O .75+0.8 =
8.5×100=
0.18×0.3=
O .04×25=
1000×0.756=
0.5×100=
2.5×1.47×0.4=
1.25×8=
3.8×2=
1.6×0.2=
2.5x3
3.1x5
2.1x9
8.9x20
6.8x3
5.5x5
2.5x4
0.125x4
3.3x4
5.7x4
6.5x7
2.2x4
3.5x5
4.6x6
255x0.125
3.6x7
3.5x7
3.2x2
3.4x2
1.5.06*60+4.94*60
2.62.5*1000-61.5*1000
3.98.54*99+98.54
4.9.3*10-9.3*9
5.0.25*4+1.25*0.8