395+х=864
х=864-395
х=469
300-у=206
-у= -300+206
-у= -94
y=94
166=m-34
-m= -166-34
-m= -200
m=200
z+213=584
z=584-213
z=371
t-307=308
t=308+307
t=615
59=81-k
k= -59+81
k=22
(37 296:37-17 780:35):250=2
395+х=864
х=864-395
х=469
300-у=206
-у= -300+206
-у= -94
y=94
166=m-34
-m= -166-34
-m= -200
m=200
z+213=584
z=584-213
z=371
t-307=308
t=308+307
t=615
59=81-k
k= -59+81
k=22
(37 296:37-17 780:35):250=2