题目内容
解方程
(1)x÷1.8=
| (2)19-120%X=7. |
(1)x÷1.8=
,
x÷1.8×1.8=
×1.8,
x=1.35;
(2)19-120%X=7,
19-120%X+1.2x=7+1.2x,
7+1.2x=19,
7+1.2x-7=19-7,
1.2x=12,
1.2x÷1.2=12÷1.2,
x=10;
| 3 |
| 4 |
x÷1.8×1.8=
| 3 |
| 4 |
x=1.35;
(2)19-120%X=7,
19-120%X+1.2x=7+1.2x,
7+1.2x=19,
7+1.2x-7=19-7,
1.2x=12,
1.2x÷1.2=12÷1.2,
x=10;
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