Q: Subtract two from double a number in algebraic expression?

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x2+7

The Base in the Algebraic Expression can be a Number or A Variable. EX. 42 or X2 - 4 and X are the base.

Let the number be x and so the expression is 8x

The algebraic expression for three more than a number is: X + 3

37n

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2x + 7

It is 2n + 20.

2x + 5

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

x2+7

Let the original number be y Therefore the new number is given by the expression 2y + 6

Double mean to multiply.For example: the algebra expression 2x can be written in the English Phrases like-Double a Number-Twice a number-Two of a number-Two times a number-or the product of two and a number.

classifacation of algebraic expression according to the number of terms

a common factor

Suppose the function is "multiply a number x by two then subtract three and divide the whole thing by five". The algebraic expression would be: f(x) = (2x-3)/5

2n

The Base in the Algebraic Expression can be a Number or A Variable. EX. 42 or X2 - 4 and X are the base.