5)(3-х) /3 = (х+1)/2 -5х/4
Общ. зн. 12. Дополн. множ. 4; 6; 3.
(3-х) *4 = (х+1)*6 -5х*3;
12-4х = 6х+6-15х; -4х-6х+15х = 6-12; 5х=-6; х=-6/5=-1,2
6)6a(a-x+c)+6x(a+x-c)-6c(a-x-c)=6a^2-6ax+6ac+6ax+6x^2-6xc-6ac+6cx+6c^2=6a^2+6x^2+6c^2=6(a+x+c)^2
