Foster’s answer to the question he wrote for Ranger was 7x + (–3), while Ranger’s answer was 7x – 3. They both checked their wor k by letting x = 5, and they both claim to be correct. Are they both correct? Explain.
2 answers:
Both Foster and Ranger are correct because subtracting 3 is the same as adding –3. If you let x = 5 in either of the expressions, you get the answer 32.
Answer:
Yes, they are both correct.
Step-by-step explanation:
Subtracting is the same as adding a negative number.
Ranger's answer was 7x-3; this is the same as 7x+(-3). This means they are both correct.
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