Question

Solve.

Four times a number is equal to the number increased by 21. Find the number.
The number is

Answer 1

Let x equal the number

Tip: Go step-by-step

4 times a number is translated to... 4x

Is equal to means =

to the number increased by 21 is... x+21

Your equation is: 4x=x+21

Subtract x from both sides

3x=21

Divide three from both sides

x=7

Check!

4(7) = 7+21

28=28!

Correct!

Have a nice day!!