Answer: r = 4
Explanation:
1. Divide both sides by -4
6r + 1 = -100/-4
2. Two negatives make a positve
6r + 1 = 100/4
3. Simplify 100/4 to 25
6r + 1 = 25
4. Subtract 1 from both sides
6r = 25 - 1
5. Simplify 25 - 1 to 24
6r = 24
6. Divide both sides by 6
r = 24/6
7. Simplify 24/6 to 4
r = 4
Hope this helps & happy halloween! :)