80-40=30+_
10
post it.
To find the missing value in the equation 80 - 40 = 30 + x, we can follow these steps:
Step 1: Subtract 40 from 80 on the left side of the equation:
80 - 40 = 40
Step 2: Write down the simplified equation:
40 = 30 + x
Step 3: To isolate the variable x, we need to subtract 30 from both sides of the equation:
40 - 30 = 30 - 30 + x
10 = x
Therefore, the missing value is x = 10.