Answer:
15 + 3x = 27
x = 4
Step-by-step explanation:
since you don’t know what three is being multiplied by, we use x as a variable (or any letter you want). to get to 27 you have to add 15 to 3x, so now you have the equation 15+3x=27. next you must subtract 15 from both sides of the equation (not from 3x cuz they’re not like terms) now you have the equation; 3x=12. divide both sides by three, and then you’ll end up with the answer x = 4
Hope this helps