Decimals and Fractions Practice Test 3

Question : 16 of 40

Marks: +1, -0

If 21 is add to four times a number, the result is 57. The number is

Solution:

Let the number be x
∴ 4x + 21 = 57 or, 4x = 57 – 21 = 36
Hence,

x = 36/4 = 9

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