Answer:
The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol.
Step-by-step explanation:
In the <span>addition process</span> this usually involves:
<span><span>rounding numbers up to the nearest multiple of 10 or 100 </span>subtracting the extras that were added at the end.</span>
In the subtraction process this usually involves subtracting too much and completing the calculation by putting some back.

x=8
16-8=8

Use a calculator to find the square root of 8.
Answer:
Simple
Step-by-step explanation:
Remove cables from battery terminals. ...
Remove the screws or fasteners holding the battery in place; then Remove the Battery. ...
Inspect the tray the old battery was resting on. ...
Position your new car battery on the tray. ...
Replace the screws/fasteners to the new battery to secure it in place.
Step 6. Reconnect your battery cables in the reverse order in which you took them off