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Half of 18 is 9 and 5+4 = 9 so the number is 5

Q: Twice the sum of a number and four is eighteen?

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twice a number can be 2x and six less than it is 2x-6.

If the sum of a number and 4 is (X + 4) then twice that is 2(X + 4) which is 2X + 8

Write the following as an algebraic expression using x as the variable: The sum of a number and -8

Twice the sum of 'x' and 'y' . . . 2(x+y) The sum of twice 'x' and 'y' . . . (2x+y)

The additive inverse of 18 is -18. The additive inverse of any number is the opposite of that number, such that the sum of the original number and the additive inverse is zero.

Related questions

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The difference between a number x and twice y is equal to fifteen.

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4*m/5 + 18

4m/5 + 18

If the number is n, then twice the number is 2n and the sum of the two is n + 2n = 3n.

twice a number can be 2x and six less than it is 2x-6.

118

Eighteen

4*(2x + 8) = 32

970.

This is an algebraic expression. It can be written as 3(2x + 4)