Foster’s answer to the question he wrote for Ranger was 7x + (–3), while Ranger’s answer was 7x – 3. They both checked their work by letting x = 5, and they both claim to be correct. Are they both correct? Explain.

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.

Yes.

Step-by-step explanation:

7(5) + (-3) = 32

7(5) + -3 = 32

Both of the equations have the same answer so it's correct.

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.