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Value of an Expression

Question 57 C...

Question

Question 57

Choose a letter x, y, z, p etc...., wherever necessary, for the unknown (variable) and write the corresponding expressions for the given statement:

$20^{o} C$ less than the present temperature.

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Solution

Let the present temperature be $t^{o} C$ .

$20^{o} C$ less than the present temperature is got by subtracting $20^{o} C$ from present temperature.

$∴$ Required expression = $(t - 20)^{o} C$

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