225.
1)х+2>15 4)-4>5-y
х>15-2 y>5+4
х>13 y>9
2)х-6<8 5)2z>z-7
х<8+6 2z-z>-7
х<14 z>-7
3)3<y+6 6)3z<2z+4
-y<6-3 3z-2z<4
-y<3 z<4
y>-3
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225.
1)х+2>15 4)-4>5-y
х>15-2 y>5+4
х>13 y>9
2)х-6<8 5)2z>z-7
х<8+6 2z-z>-7
х<14 z>-7
3)3<y+6 6)3z<2z+4
-y<6-3 3z-2z<4
-y<3 z<4
y>-3