А)10k-8k=48 б)(m-2)помножить(8-m)=0 в)28x5x=99 г)8x-24+48=16

a)10k - 8k = 48;

2k = 48;

k = 24;

б)(m - 2)*(8 - m) = 0;

8m - m^2 - 16 + 2m = 0;

-m^2 + 10m - 16 = 0;

m^2 - 10m + 16 = 0;

D = 10^2 - 4*1*16 = 100 - 64 = 36;

m1 = (10 + 36)/2*1 = 16/2 = 8;

m2 = (10 - 36)/2*1 = 4/2 = 2;

Ответ: m1 = 8; m2 = 2;

в) 28*5x = 99;

5x = 99/28;

x = 99/140;

г) 8x - 24 + 48 = 16;

8x = 16 + 24 - 48;

8x = -8;

x = -1;