Question 1103679
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First evening + second evening + third evening = 122 phone callse

(x-10)        + x              + 4x            = 122


6x - 10 = 122  ====>  6x = 122 + 10 = 132  ====>  x = {{{132/6}}} = 22.


From this point, can you complete the solution on your own ?
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