2n plus 7 equals 19 2n equals 12 n equals 6
2n + 19 = -7 2n = -7 - 19 2n = -26 n= -13
If 'n' is 8, then (2n - 7) is 9 .
1/2
If: 2n = 1 Then: n = 1/2 or 0.5
1
5n + 7 = 28 + 2n (-2n) 3n + 7 = 28 (-7) 3n = 21 therefore, n = 7
Answer is 3, 5, 7, 9detailsassume the numbers are2n-3, 2n-1, 2n+1, 2n+3 ......................... (1)(2n-3) 2 + (2n-1) 2 + (2n+1) 2 + (2n+3) 2 = 16416n 2 + 20 = 16416n 2 = 144n2 = 9n = 3Substitute in eq 1 we get the answer above
6=(1-2n)+5 6-5=(1-2n)+5-5 1=1-2n 1-1=1-1-2n 0=-2n 0/-2=-2n/-2 0=n
2n - 7 = 5n - 10subtract 2n from each side- 7 = 3n - 10add 10 to each side3 = 3ndivide both sides integers by 31 = n=======check in original equation2(1) - 7 = 5(1) - 102 - 7 = 5 - 10- 5 = - 5========checks
3n + 2n = 7 + 4n 5n = 7 + 4n 5n - 4n = 7 n = 7
7-2n=n-147-2n+2n=n-14+2n7=3n-147+14=3n21=3n21/3=3n/37=n