Which of the following is not allowed in the equation?a. adding the sa...
Understanding Operations in Equations
In solving equations, certain operations can be performed to maintain equality. Let's evaluate each option provided:
Adding the Same Number
- Adding the same number to both sides of the equation is allowed.
- It preserves the equality because if \( a = b \), then \( a + c = b + c \).
Subtracting the Same Number
- Subtracting the same number from both sides of the equation is also allowed.
- This operation maintains equality. For instance, if \( a = b \), then \( a - c = b - c \).
Multiplying by the Same Non-zero Number
- Multiplying both sides of the equation by the same non-zero number is permissible.
- For example, if \( a = b \), then \( a \times c = b \times c \) (provided \( c \neq 0 \)).
Dividing by the Same Number
- Dividing both sides of the equation by the same number is allowed, but with a crucial condition.
- If the number is zero, this operation is not allowed. Division by zero is undefined. Thus, if \( a = b \), then \( a \div c = b \div c \) is valid only if \( c \neq 0 \).
Conclusion
In summary, all operations listed (a, b, and c) are allowed; however, option (d) has a restriction when dividing by zero. Therefore, the operation that is not universally allowed is:
Dividing both sides of the equation by the same number (if that number is zero).
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