1)
5y+9≤3-7у
5у+7у≤3-9
12у≤-6
у≤-0.5
2)
3х+1≤4х-5
3х-4х≤-1-5
-х≤-6 |*(-1)
x≥6
3)
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Verified answer
1)
5y+9≤3-7у
5у+7у≤3-9
12у≤-6
у≤-0.5
2)
3х+1≤4х-5
3х-4х≤-1-5
-х≤-6 |*(-1)
x≥6
3)