Answer:
10
Step-by-step explanation:
The sum of a number and 4 is multiplied by 2, and the result is 28. In other words, letting the unknown number be x:
[tex]2(x+4)=28[/tex]
Solve for x. Divide both sides by 2:
[tex]x+4=14[/tex]
Subtract 4 from both sides:
[tex]x=10[/tex]
So, our unknown number is 10.
And we're done!
