Denote bachelors' salary as b (in thousands of dollars), then doctorate's salary d is 2*b-39. The sum is b+(2*b-39)=3*b-39=126.
So 3*b=126+39=165 and b=165/3=55 (thousands of dollars).
this is for question number 22?
sorry i also needed number 21 i forgot to type that
Yes, it is for 22.
21 is very similar, look:
m = 2*b - 49 and m+b = 3*b - 49 = 116.Then 3b = 116+49 = 165 and b = 165/3 = 55 (thousands of $).And m = 2b - 49 = 110 - 49 = 61.
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