Answer:
75
Explanation:
Given relations between three scores that total 203, you want to know the first score.
Setup
The equations for scores a, b, c can be written ...
a + b + c = 203
a - b = 14
a + b - 2c = 2
where 'a' is the fist score.
Solution
We can write expressions for b and c using the last two equations.
b = a -14
2c = a +b -2 = a +(a -14) -2 = 2a -16 ⇒ c = a -8
Substituting into the first equation gives ...
a +(a -14) +(a -8) = 203
3a = 225 . . . . . . add 22
a = 75 . . . . . . . . divide by 3
The first score was 75.
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Additional comment
A calculator can solve the three equations shown in the setup, giving all three answers as quickly as the coefficients can be entered.
(a, b, c) = (75, 61, 67)