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

Step-by-step 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:

$\frac{3x}{3}=\frac{24}{3}\\\\x=8$