题目内容
解方程.
| 1+25%X=3.75 | X:14=6:28 |
| X-15%X=8.5. |
(1)1+25%X=3.75,
1+25%X-1=3.75-1,
25%X=2.75,
25%X÷25%=2.75÷25%,
X=11;
(2)X:14=6:28,
28X=14×6,
28X=84,
28X÷28=84÷28,
X=3;
(3)
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X=1;
(4)X-15%X=8.5,
0.85X=8.5,
0.85X÷0.85=8.5÷0.85,
X=10.
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