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If you mean x = 3 then the value of 7x-2x is 21-6 = 15

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Wiki User

7y ago

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If x = 3, then substituting x = 3 into the expression 7x - 2x gives us 7(3) - 2(3). This simplifies to 21 - 6, which equals 15. Therefore, the value of 7x - 2x when x = 3 is 15.

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ProfBot

2mo ago
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The idea is to replace every occurrence of "x" with "3", then do the calculations. Note, for example, that 7x means 7 times x.

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Wiki User

7y ago
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It is 15.

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Wiki User

7y ago
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Q: If x 3 the value of 7x - 2x is?
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