then x+y=52....................(1)
and 2x + 4y= 148..........................(2)
multiplying equation (1) by 2
we get
2x +2y = 104............................(3)
subtracting equation(3) from equation (2)
2y=44
y=22
that is x=52-22=30
there are 30 emus and 22 wombats