The algebraic expression is 2m+6
It is simply: 2x
3 x 2 = 6
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)
2w - 10
As an algebraic expression it is: 2x-9
eight less than twice a number
2x = 76 x = 38
As an algebraic expression it is: 2x+4
The corresponding expression would be 2x - 6 = 4.
2x + w = -w
If ' x ' is your number, then the quotient is 2x/6.
The algebraic expression for three more than a number is: X + 3