1) 8(х-14)=56,
8х-112=56,
8х=56+112,
8х=168,
х=21.
2) (46-х)*19=418,
874-19х=418,
-19х=418-874,
-19х=-456,
х=24.
3) 9(143-13х)=234,
1287-117х=234,
-117х=234-1287,
-117х=-1053,
х=9.
4) 17(5х-16)=238,
85х-272=238,
85х=238+272,
85х=510,
х=6.
5) 14+4х-48=240,
4х=240-14+48,
4х=274,
х=68,5.
6) 25b-7b-9=279,
18b=288,
b=16.
7) 16a-7a+96=222,
9a=126,
a=14.
8) 20y+5y+y+19=227,
26y=208,
y=8.
9) 9b+6b-15=615
15b=630,
b=42.
10) 2a+123a+97=472,
125a=375,
a=3.
11) 17x-x+5x-19=170,
21x=189,
x=9.
12) 73y-y-22y+40=190,
50y=150,
y=3.