I don't understand what I'm supposed to do

I have to write a java program for a class and I'm not sure about what to do for one of the methods. The program is for equations in the form ax + by = c. A, b, and c are the coefficients and constant. I have the rest of the program written but I don't understand this method: The verifySolution method verifies that the equality in the equation is correct with the provided x and y parameter values. It returns a value of true if the solution is correct and false otherwise. My code:
public boolean verifySolution (Equation e)
{
if ()
return true;
else
return false;
}

I'm not sure what to put in the if statement. Two of the other methods are solve for x and solve for y. I think those somehow come into the code. In the test case provide one of the tests is:
pubilc void testSolvingPairs()
{
try {
Equation uut1 = new Equation (1 , -1 , 4) ; Equation uut2 = new Equation (1 , -1 , 2) ; assertEquals(3.0 , uut1. solveForXWith(uut2) , Equation.THRESHHOLD);
assertEquals(1.0 , uut1. solveForXWith(uut2) , Equation.THRESHHOLD);
assertEquals(3.0 , uut2. solveForXWith(uut1) , Equation.THRESHHOLD);
assertEquals(1.0 , uut2. solveForXWith(uut1) , Equation.THRESHHOLD);
assertTrue(uut1. verifySolution(3.0 , 1 ,0)) ;
assertTrue(uut2. verifySolution(3.0 , 1 ,0)) ;
}