10 minus negative 10 equals 20: 10 - (-10) = 20 or rather 10 + 10 = 20. 10- (minus 10) = 20
20 minus 17 minus 3 minus 2 equals -2
30
40
It is: 56 minus 20 = 36
13 + a + 7 = 5 + b - 20. This assumes the two numbers are different.
20 - 3 = 17
A number "m" plus 40 equals 60. Therefore, 60 minus 40 equals m. m therefore equals 20.
First write the equation for this which is (n / 4 ) - 5 = 15. The number is 80. 80 divided by 4 equals 20 and 20 minus 5 equals 15.
You would do 540 x .10 and this would give you 10% of that number, which equals 54. .10 = 10% .20 = 20%
x = 2
20% can be written as 0.2, if you meant 45 - 0.2 that equals 44.8 If you meant 45 minus 20 percent of 45, then 45-(45 x 0.2) equals 36