3/4: 1/3x+1/4+2/3=1 решить уравнение

3/4 : 1/3x + 1/4 + 2/3 = 1 
3/4 : 1/3х = 1 - 1/4 - 2/3
3/4 : 1/3х = 12/12 - 3/12 - 8/12
3/4 : 1/3х = 1/12
1/3х = 3/4 : 1/12
1/3х = 3/4 * 12/1
1/3х = 3/1 * 3/1
1/3х = 9
х = 9 : 1/3
х = 9 * 3
х = 27