214-7c=5460/42;
214-7c=130.
-7c=130-214;
-7c=-84.
c =84/7;
ответ: с=12
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214-7c=5460/42;
214-7c=130.
-7c=130-214;
-7c=-84.
c =84/7;
ответ: с=12
214 - 7 * c = 130
7 * c = 214 - 130
7 * c = 84
c = 84 : 7
c = 12