Question

(1 целая 2/7x - 1/3)*21=2

Answer 1

х*9/7*21-1/3*21=2
27х-7=2
27х=9
х=9:27
х=1/3

Answer 2

(1 2/7x-1/3)*21=2; (9/7x-1/3)*21=2; 21*9/7x-1/3*21=2; 3x-1/7=2; 3x=2+1/7; 3x=15/7; x=15/7 : 3; x=5/7;