4*10^5 where 5 is the unknown exponent
Answer:
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Answer: 4x - 13
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Step-by-step explanation:
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<em>First, we need to get triple of x:</em>
Triple of x is: 3x
<em>Next is to get the difference between 3x and 13:</em>
x + 3x -13
4x - 13
Hence, the variable expression is 4x - 13