题目内容
| 求未知数x 9×3-
|
|
(1)9×3-
x=13.4,
27-1.7x=13.4,
27-1.7x+1.7x=13.4+1.7x,
13.4+1.7x=27,
13.4+1.7x-13.4=27-13.4,
1.7x=13.6,
1.7x÷1.7=13.6÷1.7,
x=8;
(2)
=1.5:0.12,
0.12x=6.4×1.5,
0.12x=9.6,
0.12x÷0.12=9.6÷0.12,
x=80.
| 17 |
| 10 |
27-1.7x=13.4,
27-1.7x+1.7x=13.4+1.7x,
13.4+1.7x=27,
13.4+1.7x-13.4=27-13.4,
1.7x=13.6,
1.7x÷1.7=13.6÷1.7,
x=8;
(2)
| x |
| 6.4 |
0.12x=6.4×1.5,
0.12x=9.6,
0.12x÷0.12=9.6÷0.12,
x=80.
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