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2*abs(2-n) = 9
Twice a number would be written as 2x.
2z
2•(p-q)
2x + 27
"the sum of 2" and "twice" "a number" "is" "36"2+2x=36 â–
8+2n
2n + (-5)
2*(n+3)
Watch closely ==> [ 1 - 2x ] .
2x+x=3x
3H2 + N2 yields 2NH3
2n - 4