Answer:
The answer is 39.
Step-by-step explanation:
You have to substitute the value of x into the expression :
[tex]3x + 12[/tex]
[tex]let \: x = 9[/tex]
[tex]3(9) + 12 = 27 + 12 = 39[/tex]
39
To solve your question we must replace x with the given number which is 9 so,
3 (9) +12 =
We can now solve it by multiplying 3 * 9 which will give us 27. Then we can add 27 to 12.
27 + 12 = 39
Hope this helps!!
