题目内容
| 解方程 X+25%X=50 |
| 30%X-2.6=6.4. |
(1)X+25%X=50,
1.25X=50,
1.25X÷1.25=50÷1.25,
X=40;
(2)
:X=20%,
0.2X=
,
0.2X÷0.2=
÷0.2,
X=
;
(3)30%X-2.6=6.4,
0.3X-2.6+2.6=6.4+2.6,
0.3X÷0.3=9÷0.3,
X=30.
1.25X=50,
1.25X÷1.25=50÷1.25,
X=40;
(2)
| 7 |
| 8 |
0.2X=
| 7 |
| 8 |
0.2X÷0.2=
| 7 |
| 8 |
X=
| 35 |
| 8 |
(3)30%X-2.6=6.4,
0.3X-2.6+2.6=6.4+2.6,
0.3X÷0.3=9÷0.3,
X=30.
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