John's sister's age is 10 years less than 5 times John's age. Sister's age is 7 years. Write the following statement in an equation.

10 + 5 x = 7

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5 x - 10 = 7

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10 \times 5 x = 7

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10 = 5 x - 7

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Solution

The correct option is B $5 x - 10 = 7$
Let John's age be $x$ years
5 times his age $= 5 x$
sister's age $= 5 x - 10$
Given sister's age $= 7$ years
Therefore, $5 x - 10 = 7$

So, option B is correct.

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John's sister's age is 10 years less than 5 times John's age. Sister's age is 7 years. Write the following statement in an equation.

The correct option is B 5x−10=7Let John's age be x years5 times his age =5xsister's age =5x−10Given sister's age =7 yearsTherefore, 5x−10=7So, option B is correct.

The correct option is B $5 x - 10 = 7$
Let John's age be $x$ years
5 times his age $= 5 x$
sister's age $= 5 x - 10$
Given sister's age $= 7$ years
Therefore, $5 x - 10 = 7$

So, option B is correct.