Identify equivalent expressions by substituting values

Put the same number in for the letter in both expressions. Work out each side. Equivalent expressions give the same result every time.

1. Are m + 5 and 2m + 5 + m equivalent? Substitute m = 7 into both.
2. Are 1 + 5n and 3n + 1 + 2n equivalent? Substitute n = 6 into both.
3. Are 12a + 4 and 4(1 + 3a) equivalent? Substitute a = 3 into both.
4. Are 3 + t and t + t + t equivalent? Substitute t = 3 into both.
5. Are 5m + 6 + 2m and 7m + 6 equivalent? Substitute m = 7 into both.
6. Are 4a and a + a + a + a equivalent? Substitute a = 2 into both.
7. Are 36n + 8 and 4(2 + 9n) equivalent? Substitute n = 8 into both.
8. Are 8n + 5 + 4n and 32n + 5 equivalent? Substitute n = 6 into both.
9. Are 9(2m + 1) and 18m + 9 equivalent? Substitute m = 8 into both.
10. Are x + x + x + x + x and 5x equivalent? Substitute x = 6 into both.
11. Are 9 + 30p and 6(9 + 5p) equivalent? Substitute p = 4 into both.
12. Are w + 3 and w + 3 + w equivalent? Substitute w = 4 into both.
13. Are 30 + 135m and 15(9m + 2) equivalent? Substitute m = 6 into both.
14. Are −2 − 15a and 8 − (15a + 10) equivalent? Substitute a = 5 into both.
15. Are 3w and w + w + w equivalent? Substitute w = 2 into both.
16. Are 4w − 2 and w + w + w + w equivalent? Substitute w = 9 into both.
17. Are 23 + 270p and 18(23 + 15p) equivalent? Substitute p = 3 into both.
18. Are −4 − 21p and 24 − (21p + 25) equivalent? Substitute p = 9 into both.
19. Are 10 + 29x and 12x + 10 + 17x equivalent? Substitute x = 2 into both.
20. Are 15x + 2 + 25x and 2 + 40x equivalent? Substitute x = 7 into both.