60
4m + 3m = 180 7m = 180 m = 25 5/7
Any value you like.
100+80, 99+81, 98+82....
To solve this one, subtract 50 from 180 and you'll have your answer.
It is: 126 plus 54 = 180
a + 3a + 5a = 180 9a =180 a = 20
It is: 97+83 = 180
It is: 157+23 = 180
It is 90+90 = 180
It is 134+46 = 180
180+72=252