What is the number that should replace y?
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What is the number that should replace y?
We begin by solving the multiplication exercise:
and subsequently the exercises within brackets:
We obtain the following:
Keep in mind that a negative times a negative becomes a positive:
Next we simplify and add:
We obtain the following calculation:
We then rearrange the sections:
Lastly we multiply by 7:
49
\( x+7=14 \)
\( x=\text{?} \)
Because multiplication comes before subtraction in PEMDAS! The expression means 23 - (12×(-5)), not (23-12)×(-5). Order of operations is crucial for getting the right answer.
The colon means division, just like ÷. So y:7 is the same as or y÷7. It's common notation in some countries.
When you have minus a negative number, it becomes positive! So 23-(-60) becomes 23+60. Remember: subtracting a negative = adding a positive.
No! First simplify everything else using PEMDAS. Get the equation down to something simple like , then solve for y.
Go back and check each step carefully! Common errors include: forgetting PEMDAS order, making arithmetic mistakes, or incorrectly handling negative numbers. Take your time with each calculation.
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