(2 2/3х+1 3/7)*21=58
помогите плиз

(2 2/3*х+1 3/7)*21=58
2 2/3*х+1 3/7=58:21
2 2/3*х=2 16/21-1 3/7
2 2/3*х=2 16/21-1 9/21
2 2/3*х=1 7/21
2 2/3*х=1 1/3
х=1 1/3:2 2/3
х=4/3:8/3
х=1/2