3n+6=18 n+2=6 n=4
3n = 0.138 n = 0.046
When n = 4, 3n = 3*4 = 12
3n+18 is an algebraic expression and n is an unknown variable
3n x 3n = 9n if 9n = 36 then n = 36/9 = 4
3n-5=13 +5 +5 3n=18 /3 /3 n=6
3n and n = 4? 3n ( the four replaces the n 3(4) = 12 =======
3n+6=18 n+2=6 n=4
n = 3 3n x 2 = 18 3n x 2 / 2 = 18 / 2 3n = 9 3n / 3 = 9 / 3 n = 3
3n -5 = 19 3n = 19+5 3n = 24 n = 8
This can not be solved as it is not an equation but a simple expression. If you are looking to factor it, then the answer is: n2 - 3n - 18 = (n - 6)(n + 3)
3n+18 = 39 -4n 3n+4n = 39 -18 7n = 21 n = 3
-3n+5n+4 = -4 2n = -4-4 2n = -8 n = -4
3n - 2n = n 3n - 2n = (3 - 2)n = 1n = n
3n=36 Write the equation n=12 Divide each side of the equation by 3 to get the variable alone.
Let's give it a go:3n - 6 = 9Add 6 to each side of the equation:3n = 15Divide each side by 3:n = 5
4n - 7n = 21(4-7) n =21-3n = 21divide both sides by -3n = -7