Seven more than the product of a number and 3 is 20.

Question

Seven more than the product of a number and 3 is 20

Answer 1

Let's break down what each term means.

 

Seven more than means "7 plus"

 

Product of a number and 3 means "the number times 3"

 

Is means "is equal to"

 

And you want to find "the number," which we'll call "x"

 

So seven more than (7+) the product of a number and 3 (x times 3, or 3x) is (equals) 20.

 

7 + 3x = 20

 

Subtract 7 from each side

 

7 (- 7) + 3x = 20 (- 7)

 

3x =13

 

Divide both sides by 3

 

3x = 13

__   ___

3       3

 

The threes on the left cancel out, so you are left with

 

x = 13/3

 

x = 4 1/3

 

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Answer 2

"Seven more than" means "add 7"

 

"Product of a number and 3" means "3 x n" or "3n", where n = a number

 

"is" means "equals"

 

"20" means "20"

 

So...

 

7 + 3n = 20