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drek231 [11]
3 years ago
10

Will mark brainlist if its right

Mathematics
1 answer:
Viktor [21]3 years ago
6 0

Answer:

3x \leqslant 21 \\ x \leqslant  \frac{21}{3}  \\ x \leqslant 7

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Answer:

Try this

Step-by-step explanation:

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7 0
3 years ago
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marshall27 [118]

Answer:

Step-by-step explanation:

A symbol for a value we don't know yet. It is usually a letter like x or y.

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Why "variable" when it may have just one value? In the case of x + 2 = 6 we can solve it to find that x = 4. But in something like y = x + 2 (a linear equation) x can have many values. In general it is much easier to always call it a variable even though in some cases it is a single value.

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Brilliant_brown [7]
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