Answer: 14.5
Explanation:
___ (18+21) = 126 + 441
Since the blank space was put next to the 18+21, I'm going to assume it means multiplication, as any unknown variable next to a number indicates multiplication.
Step 1: Combine like terms
aka combine all of the numbers by completing the operations:
___ (18+21) = 126 + 441
___39 = 567
Step 2: Turn the ___ into an x to turn it into a proper algebra equation
Now, we have 39x=567
Step 3: Divide.
39x= 567
Since 39x is 39 times x, we must do the opposite type of equation to solve for x and that is to divide.
567÷39= 14.5384615
Step 3: Round to the nearest tenth
Get the decimal place down to 2 numbers:
14.5384615--> 14.53--> 14.50
14.50 is the same as 14.5.
Answer= 14.5
I hope this is correct!!