If you mean: 4n-2n = 4 then 2n = 4 and n = 2
If you mean 2n+4, or 2n-4, that already is an algebraic expression. The idea might be to put it into words. 2n+4 is twice n, increased by 4. Notice you need a comma because if you write twice n increased by 4 this is 2(n+4)
Un = 2n - 8 Un = 2n - 8 Un = 2n - 8 Un = 2n - 8
Sum of interior angles is (2n-4) right angles There are 66 right angles in 5940 degrees So (2n - 4) = 66 2n = 70 n = 35
First we must collect and simplify 'like terms' 2n-6n-36. 2n-6n = -4n Therefore, -4n-36 Take out the greatest common factor. -4 (n+9) Ans = -4 (n+9)
two multiplied by a number increased by four
2n plus 4 = 2n + 4
Four more than twice a number.
You can't. 17 + 2n = 21 + 2n gives: 2n = 4 + 2n which gives 0=4 which is not possible so the sum is not solveable.
It's an algbraic expession in the form of: 2n+4
-3n+5n+4 = -4 2n = -4-4 2n = -8 n = -4
'n' can be any number, but when applied to (2n + 4), n = 2.5
The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1
10n = 7n + 4 + 2n so 10n = 9n + 4 Subtract 9n from both sides: n = 4
5n + 7 = 28 + 2n (-2n) 3n + 7 = 28 (-7) 3n = 21 therefore, n = 7
2n+4: 6,8,10......104........204
1 + 2 + 4 + ... + 2n = 2n+1 - 1