Final answer:
If the first term on the right side of the equation stays the same and the second term changes sign, it means adding a positive and a negative number.
Step-by-step explanation:
If the sign of the first term on the right side of the equation stayed the same and the sign of the second term on the right side of the equation changed, it means that one of the terms on the right side of the equation is negative and the other term is positive. This would result in adding a positive and a negative number together. When adding a positive and a negative number, you can subtract the absolute value of the smaller number from the absolute value of the larger number and then use the sign of the larger number as the sign of the answer. For example, if the first term is 5 and the second term is -3, the sum would be 5 + (-3) = 2.