1 дм=10 см
5 дм =50 см
1м =100 см
1 м > 5 дм
(x+7)/8=9
9*8=(x+7)
72=(x+7)
72-7=x
65=x
x=65
Решение
x = 24
x - 6 = 24 - 6 = 18
x/6 = 24/6 = 4
x = 36
x - 6 = 36 - 6 = 30
x/6 = 36/6 = 6
x = 42
x - 6 = 36
x/6 = 42/6 = 7
x = 180
x - 6 = 180 - 6 = 174
x/6 = 180/6 = 30
x = 240
x - 6 = 240 - 6 = 234
x/6 = 240/6 = 40