Question

If 3 times a certain number is increased by 4 the result is 28 what is the number

Answer 1

3x+4=28
-4 -4
3x=24
/3 /3
x=8

Answer 2

Answer: The number is 8

Explanation:

Let be "x" the certain number. Then "3 times a certain number" means that the number "x" is multiplied by 3. This is:

`(3)(x)=3x`

Now, "3 times a certain number is increased by 4" means that the we must add 4 to
`3x`, in other words, this indicate an addition:

`3x+4`

And finally "3 times a certain number is increased by 4 the result is 28" means that
`3x+4` is equal to 28. Then the expression is:

`3x+4=28`

To find the number "x", subtract 4 from both sides of the equation:

`3x+4-4=28-4`

`3x=24`

Dividing both sides of the equation by 3, you get that the number is:

`(3x)/(3)=(24)/(3)\\\\x=8`