To solve for the blank, you can set up the equation:
30 + x = 40
Subtract 30 from both sides:
x = 40 - 30
x = 10
So, the blank should be filled with 10.
1 answer
To solve for the blank, you can set up the equation:
30 + x = 40
Subtract 30 from both sides:
x = 40 - 30
x = 10
So, the blank should be filled with 10.