10 minus -20 is 30.
50 - 20 = 30
-10
you minus the two sets of # first then find out what "a" is always the # after the = minus the # before "a" 30 + a = 50 a = 50 - 30 a = 20 30-30=50-30 (50-30=20) 0+a=20 a=20 if a = 20 30+a=50 30+20=50 50=50 therefore a=20
20 + 10 - 31 + 30 - 5 = 24
30
The answer two 50 minus 20 is 30.
19/20 minus 11/12 = 1/30
20 - 50 = -30
in 2009, 20
9/10 =27/30 2/3 = 20/30 27/30 - 20/30 = 7/30
-0.02