For the above expression:
f(x,y) = 3x+7y/x+y, where x+y != 0, if the value of f(x,y) = 4, the expression can be reduced to:
f(x,y) = 4 = 3x+7y/x+y
=> x = 7y - 4y
=> x = 3y
From the table of values given I am assuming we are to select two values which are fit the equation f(x,y).
In the table, select a value for x and a value for y corresponding to f(x,y) = 4. Make only two selections, one in each column.
x --- y
The only values which match the above condition are 3 and 9. Hence f(9,3
) = 4. **edited as rajmatthew pointed out. Thanks Raj!
Please correct me if I am wrong!
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