The expression is:
7 − 2(8 − 4)
Start with the parentheses:
8 − 4 = 4
Next, multiply:
2 × 4 = 8
Now subtract:
7 − 8 = −1
The correct answer is −1.
A common mistake is to ignore the implied multiplication between 2 and the parentheses or to complete the subtraction in the wrong order.
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