题目内容
解方程:
| 0.75X-14.5×3=0 | X+60%X=28. |
(1)
=
,
3.5x=0.7×4,
3.5x÷3.5=2.8÷3.5,
x=0.8;
(2)0.75X-14.5×3=0,
0.75X-43.5+43.5=0+43.5,
0.75x÷0.75=43.5÷0.75,
x=6.8;
(3)X+60%X=28,
160%x=28,
160%x÷160%=28÷160%,
x=17.5.
| x |
| 0.7 |
| 4 |
| 3.5 |
3.5x=0.7×4,
3.5x÷3.5=2.8÷3.5,
x=0.8;
(2)0.75X-14.5×3=0,
0.75X-43.5+43.5=0+43.5,
0.75x÷0.75=43.5÷0.75,
x=6.8;
(3)X+60%X=28,
160%x=28,
160%x÷160%=28÷160%,
x=17.5.
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