11 more than five if a certain number is twenty more than 2 times of that number. what is the number?

Question

Beckett

Mathematics

24 March, 20:01

11 more than five if a certain number is twenty more than 2 times of that number. what is the number?

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11 more than five of a certain number would be written as 5x+11 and it is (means equal to) twenty more than two times that number, which would be 2x+20. So the equation would be

5x+11=2x+20

-2x - 2x (get the x's on one side)

3x+11=20

-11 - 11 (get the numbers on one side)

3x=9

/3 / 3 (divide by 3, so you can get the x by itself)

X=3 (the number is 3)