Решите уравнения 4 класс! Без остатков!

4000+5а=3000+3000

d + d + d + d= b + b + b=
b + 5b + 6b= 10а+3а+2а=
9p+20p+8p= 14p+20p+p=

Даю 30 баллов!
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