10.2x + 17.8y = 10.8 (x + y) how to solve the equation?

10.2x + 17.8y = 10.8 (x + y) how to solve the equation?

This quadratic equation of two variables can only be simplified and cannot be solved
10.2X+17.8Y=10.8(X+Y)
102X+178Y=108X+108Y
70Y=6X
Y=2/35X