Решить уравнение а)1,8x+12-7 21/29+4,2x+4 23/29=12 2/29 б)17+7,4x-8 15/31-2,4x+3 29/31=16 14/31

1,8х+12 - 7 21/29+4,2х+4 23/29=12 2/29
6х+12=12 2/29+7 21/29 - 4 23/29
6х+12=15
6х=15-12
6х=3
х=3 : 6
х=0,5

17+7,4х - 8 15/31 - 2,4х+3 29/31=16 14/31
5х+17=16 14/31+8 15/31 - 3 29/31
5х+17=21
5х=21-17
5х=4
х=4:5
х=0,8

A:
1,8x+12-7 21/29+4,2x+4 23/29=12 2/29
6x-7 21/29+4 23/29=12 2/29-12
6x-7 21/29+4 23/29 =2/29
6x=2/29 +7 21/29-4 23/29
6x=7 23/29-4 23/29
6x=3
X=1/2

B:
17+7,4x-8 15/31-2,4x+3 29/31=16 14/31
17+5x+3 29/31=16 14/31+8 15/31
20 29/31+5x=24 29/31
5x=24 29/31-20 29/31
5x=4
X=4/5=0,8