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

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:

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

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

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

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

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.