Combine like terms
x^2 + 2xy + y^2 - x - y -12
:)))
When we give x to second, then the third will be 2x and according to informations first one should be x-6. Then you have to sum all. It ll be equal to 4x-6.
78=4x-6
84=4x
21=x
So, first number is 15, second one is 21 and the last one is 42
40/100 <span>× 25 = 10.
The answer is 10 students had never visited another state.</span>
