a number is added to 9 less than twice that number,if the re
1个回答

Let the number be x.

Twice the number = 2x

Nine less than twice the number = Nine less than (2x) = 2x - 9

A number is added to 9 less than twice the number = A number is added to (2x - 9) = x + (2x - 9)

Result is 180

So, x + (2x - 9) = 180

3x - 9 = 180

3x = 180 + 9

3x = 189

x = 189/3 = 63.

So, the number is 63.

Check:

Twice 63 = 126. 9 less than 126 is 117. The number (63) is added to 117. The result is 63 + 117 = 180.

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