1. 3m -5 = 7m -21
3m + 16 = 7m + 21
3m + 16 = 7m
-3m + 16 = 4m
16 = 4m
8 = 2m
4 = m
2. 4(x - 6) = -2(x - 3)
8x - 24 = -2x + 6
10x - 24 = 2x +6
10x - 24 = 6
10x + 24 = 30
10x = 30
x = 3
3. 2(n - 3) + 5 = 3(n - 1)
2n - 6 + 5 = 3n -3
2n - 1 = 3n - 3
-2n - 1 = n - 3
-1 = n - 3
2 = n + 3
2 + n
4. All sides of a square are the same. Therefore:
5n = n + 16
5n + -n = n + 16 + -n
4n = n + -n + 16
4n = 16
2n = 8
n = 4
5 X 4 = 20. One side of the square is 20 inches.
5. 221 - 53 = 168. 168 / 2 = 84. Carl recieved 84 votes. 84 + 53 = 137. Connie recieved 137 votes.