Question

даю 35 баллов алгебра

Answer 1

$5(6a^2-6a+14)=30a^2-30a+70\\y= 12,5\\-(13x+7,2y)+(2,9x+12y)=-13x-7,2y+2,9x+12y = -10,1x+4,8y\\11p^3d(d^3p-d^3) = 11d^4p^4-11d^4p^3$