15*(a+2)=6*(2a+7) 12b-7*(b+4)=26-4b 5*(3c+2)=8*(9-2c) - вопрос №4022742152627127426453289210272543 от zadorina66 21.06.2022 08:12

Question

Математика: 15*(a+2)=6*(2a+7) 12b-7*(b+4)=26-4b 5*(3c+2)=8*(9-2c) 10k+2*(7k-2)5*(4k+3)+3k

zadorina66 · Answer

15 * (а + 2 ) = 6 * ( 2а + 7)15а  + 30 = 12а + 4215а - 12 а = 42 - 303а = 12 а = 12 / 3 а =412b - 7 * (b + 4) = 26 - 4b12b - 7b - 28 = 26 - 4 b12b - 7b + 4b = 26 + 289b = 54b = 54 / 9b = 65*(3c+2) = 8*(9-2c)15c + 10 = 72 - 16c15c + 16c = 72 - 1031c = 62c = 62 / 31c = 2...