4 times a number and 5 times the same number added to 75 gives 156. Find The Number .Help me experts and My friends

Dear student,
let the number be X.
Then, as given in the question, 4x+5x+75 = 156.
=> 9x + 75 = 156
=> 9x = 81
=> x = 9.
Therefore, the number is X = 9.

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