Your equation would be 3x + 5x + 7x + 9x = 240 Combine like terms and that would lead you to 24x = 240 Then divide by 24 on both side leaving you with x = 10 Plug in x and your answer would be 30:50:70:90
2x+4y=36 legs 2 for the two legged animals and 4 for the four legged animals There are 10 animals so insert numbers that add up to 10 in for x and y In this case x=2 y=8 Hope this helps!
