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Let x be the salary of the president and y be the salary of the Vice President.
Then from the condition, you have these two equations in two unknowns
x + y = 682400 dollars (1)
x - y = 217600 dollars (2)
Add equations (1) and (2). You will get then
2x = 682400 + 217600 = 900000
x = 900000/2 = 450000.
Next, from equation (1), you find
y = 682400 - 450000 = 232400.
ANSWER. $450000 is the salary of the President and $232400 is the salary of the Vice President.
Solved.
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