1.49-3x=34
-3x=34-1.49
-3x=32,51
x=32,51/-3
х=-10,8366666667
2.9y-89=55
2.9y=55+89
2.9y=144
y=144/2.9
у=49,6551724138
3.74-8z=2
-8z=2-3.74
-8z=-1.74
z=-1.74/-8
z=0.2175
1.49-3x=34
-3x=34-1.49
-3x=32,51
x=32,51/-3
х=-10,8366666667
2.9y-89=55
2.9y=55+89
2.9y=144
y=144/2.9
у=49,6551724138
3.74-8z=2
-8z=2-3.74
-8z=-1.74
z=-1.74/-8
z=0.2175