НСК(42,56,70)=840
НСД(42,56,70)=14
840-14=826
На 826 НСК больше за НСД
Ab = 33cm = x
ac*0.4 = 1/3 * cb
ac/40 = 1/3*cb /40
0.01*ac = 1/120*cb
ac = 100/120 * cb = 10/12*cb
ab=ac+cb = 10/12cb + 12/12cb = 22/12cb
cb = 33 * 22 /12 = 60,5cm
ac = 10*60,5/12 = 605/12 ≈ 50.4cm
658:2=329 726:2=242 568:8=71 136:4=34
∛(x-4)=3
(∛(x-4)=3)³
x-4=27
x=27+4
x=31
Проверка: ∛(31-4)=3
∛27=3