Question

Решить уравнение 0,3(n-4)-0.7(n-3)=4.9-0.9n

Answer 1

0.3п-1.2-0.7п+2.1=4.9-0.9п
0.3п-0.7п+0.9п=4.9+1.2-2.1
0.5п=4
п=8