n-8
8-n
Suppose the number is N then 4N = 3*abs(35-N) where abs(35-N) is the difference between 35 and N If N > 35 then 4*N = 3*(N-35) = 3*N - 105 So N = -105 If N < 35 then 4*N = 3*(35-N) = 105 - 3*N So 7*N = 105 ie N = 15 So N = -105 or 15
n - 8 is the expression for the difference of eight and a number.'Number' is a variable, so the variable must be a letter (in this case, 'n'). 'The difference' is going to be the subtraction symbol that is in between the 'number' and eight, so it must be n - 8. It could, of course, be 8 - n.
n+7
n - 7 = 9 n = 16
n 7
n-8
3 x (7 - n)
7*abs(n - 10) which is 7*(10 - n) if n < 10 and 7*(n - 10) if n ≥ 10
|7 - n/6| = 150
n<7
2n + (n - 7) = -31 - n3n - 7 = -31 - n3n + n + 7 - 7 = -31 + 7 + n - n4n = -244n/4 = -24/4n = -6Check:2n + (n - 7) = -31 - n2(-6) + [(-6) - 7) =? -31 - (-6)-12 + [-6 + (-7)] =? -31 + 6-12 + (-13) =? -25-25 = -25 True
N * 7
7 is 35% of this number = 20 Let N = Number Equation: 35%N = 7 35%N/35% = 7 (35%) N = 20
Any number can be the average. For example, 7 is the average of 7-n and 7+n for any number n.
8-n