Solve the following exercise:
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Solve the following exercise:
To solve the question, we need to isolate X.
Since in this case X is negative, we will move it to the other side.
(Remember that when moving terms between sides, their signs change - from positive to negative and from negative to positive).
Now, we will also move the 63 to the other side.
(Remember that 63 becomes negative when moving sides).
And now let's solve the subtraction exercise:
\( x+7=14 \)
\( x=\text{?} \)
Think of it as adding the opposite to both sides! When you have , adding +x to both sides gives .
Absolutely! You could subtract 63 from both sides first: , then add x to both sides: . Same answer!
Use the "opposite rule": if a term is positive on one side, it becomes negative on the other side. If it's negative (like -x), it becomes positive (+x).
Negative answers are completely normal! Always check your work by substituting back. If , then .
Once you understand sign changes, you can think: "What number minus from 72 gives 63?" That's , so !
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