Question

решите уровнение 4.7-8z=4.9-10z

Answer 1

-8z+10z=4.9-4.7

2z=0,2

z=0,1 

Answer 2

 4.7-8z=4.9-10z

-8z+10z=4.9-4.7
2z=0,2
z=0,1