The answer is 6 = r.
Work:
1 - r + r = -5 + r
1 + 5 = -5 + r + 5
6 = r
Answer:
1 ten and 3 ones
Step-by-step explanation:
ten + three is 13. Hence, one ten and three ones.
Answer: Choice A
Step-by-step explanation:
The correct answer is choice A. The equation 81 - a is doing exactly what the question is asking for. It represents 81 minus an unknown number, with the unknown number being shown as a.