题目内容
2x-7×2=8
x+3x=3.2×4
-
x=
12:x=28:2.
x+3x=3.2×4
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12:x=28:2.
(1)2x-7×2=8,
2x-14=8,
2x-14+14=8+14,
2x÷2=22÷2,
x=11;
(2)x+3x=3.2×4,
4x=12.8,
4x÷4=12.8÷4,
x=3.2;
(3)
-
x=
,
-
x+
x=
+
x,
-
=
+
x-
,
×6=
x×6,
x=2.5;
(4)12:x=28:2,
28x=12×2,
28x÷28=24÷28,
x=
.
2x-14=8,
2x-14+14=8+14,
2x÷2=22÷2,
x=11;
(2)x+3x=3.2×4,
4x=12.8,
4x÷4=12.8÷4,
x=3.2;
(3)
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| 6 |
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| 12 |
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x=2.5;
(4)12:x=28:2,
28x=12×2,
28x÷28=24÷28,
x=
| 6 |
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