Ayuda, por favor?

1)35K - 5K = 30K 30K÷3K = 10

2)2X - X / 2 = 54 4X - X / 2 = 54 3X = 108 X = 36

3)B = 2H 2(2H + H) = 30 2(3H) = 30 6H = 30 H = 5 B = 10

4)M = 2H N = 3(M + H) N + M + H = 96 3M + 3H + 2H + H = 96 3(2H) + 6H = 96 6H + 6H = 96 12H = 96 H = 8 M = 2H = 2(8) = 16 N = 3(H + M) = 3(8 + 16) = 3(24) = 72

5)B = 40 + C A = B + 40 = 80 + C

A + B + C = 180

80 + C + 40 + C + C = 180

3C + 120 = 180

3C = 60

C = 20

B = 60

A = 100.