We use inverse operations to solve the equation for a variable.
For example, consider the equation 4a – 7 = 33.
To find the value of a, first of all, add 7 to both the sides of the equation.
4a – 7 + 7 = 33 + 7
4a = 40
Now, divide both sides by 4 to find the value of a.
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a = 10
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21,27,23
21 is the smallest number.