8*(3с+7d)=24c+56d
(3-2d)*7=21-14d
8*(3с+7d)=8*3c+8*7d=24c+56d
(3-2b)*7=3*7-2b*7=21-14b
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Verified answer
8*(3с+7d)=24c+56d
(3-2d)*7=21-14d
Verified answer
8*(3с+7d)=8*3c+8*7d=24c+56d
(3-2b)*7=3*7-2b*7=21-14b