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DedPeter [7]
3 years ago
5

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

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
7 0
3x+4=28
-4 -4
3x=24
/3 /3
x=8
EastWind [94]3 years ago
3 0

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

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