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Q: Write a variable expression for this amount... 3 times the sum of a number z and 15?

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The expression is 9*x.

40 + x

10n

z - 7

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

15 h

n/12. n=variable......stands for the number.

s + 9

x-2

n + 11

2n/5 or (2/5)*n

(x + 9)

If x is the unknown variable then it can be: x-16

17x+(1+x)

x + 138

Subtract 25 from whatever variable you use for "a number". If your number is "x", then the expression becomes "x - 25".

'x' ounces = x/16 pounds

3n-7

the product of 8 and the sum of 10 and -7

4xz=16

This question cannot be answered. You will have to give me more detail.

If the variable x represents the number: 5x + 3ParenthesesExponentsMultiplyDivideAddSubtractAlways remember this

-8 + 13/N, where N â‰ 0.

(x - 25)*4

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