-1
19
38+n=57 n=57-38 n=19
-19 + 9 = -10n = -19n+9=-10-9 -9n=-19
If 27+n = 46 then the value of n = 19.
3n -5 = 19 3n = 19+5 3n = 24 n = 8
5x+1=20 5x=20-1 5x=19 5x/5=19/5 x=19/5
n2 = 20 + n so n2 - n - 20 = 0 that is (n - 5)(n + 4) = 0 so that n - 5 = 0 or n + 4 = 0 n = 5 or n = -4
19
For any set of numbers n-1, n, and n+1, the average will be n. For example, if the numbers are 18, 19, 20, the average will be 19.
m^4 n^5 - m^20 n^21
To find the sum of interior angles for any N-sided polygon = N*180° - 360°Solve the equation: N*180° - 360° = 3060°, for N, and N = 19
u can't solve it because there has to be one variable to solve and equal sign, ex. 4x=20. U can simifly though distrubute the n to 4 and -x. ur answer is 4n-nx