1) 4 (х-1/2) = 0
4*х - 4*1/2 = 0
4х - 2 = 0
4х = 2
х = 2 : 4 = 2/1 * 1/4 = 1/2= 0,5
2) 8(х-3/14) = 0
8*х - 8*3/14 = 0
8х - 12/7 = 0
8х = 12/7
х = 12/6 : 8 = 12/6 * 1/8 = 3/12 = 1/4 = 0,25
3) (х-1 3/4) * 2/3 = 0
2/3х - 1 3/4 * 2/3 = 0
2/3х = 1 3/4 * 2/3 = 7/4 * 2/3 = 14/3
2
х = 14/3 : 2/3 = 14/3 * 3/2 = 7
4) (х-2 1/4) * 4/5 = 0
4/5х - 2 1/4 * 4/5 = 0
4/5х = 2 1/4 * 4/5 = 9/4 * 4/5х = 9/5
х = 9/5 : 4/5 = 9/5 * 5/4 = 9/4 = 2 1/4
5) 12(х-1 3/10 * 5/6) = 0
12х = (1 3/10 * 5/6) * 12 = 13/10 * 5/6 * 12 = 13/12 * 12/1 = 13
х = 13 : 12 = 1 1/12
6) 9(х-3 1/2 * 4/7) = 0
9х = (3 1/2 * 4/7) * 9 = 7/2 * 4/7 * 9 = 2 * 9 = 18
х = 18 : 9 = 2