3.5" 12-11 9-10'8" Dt I Dt 7 LENGTH OF PIPE Det MATERIAL PI 8''PIPE STEEL SCH.40 FI 8''L. R.950 ELL B. W. F2 8 S. R.L - 13 A5 TEE А. В B С C D il 8 E RUN: 123/4" F G G Det a

3.5" 12-11 9-10'8" Dt I Dt 7 LENGTH OF PIPE Det MATERIAL PI 8''PIPE STEEL SCH.40 FI 8''L.R.950 ELL B.W. F2 8 S.R.L - 13 A5 TEE А. В B С C D il 8 E RUN: 123/4" F G G Det a

wh?

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7