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THE WORLD OF MATHEMATICS-VII
3. Solve:
(i) 8 - 2x 2 x – 5, x e N
(ii) - 5(x + 4) > 30, X E Z
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Answer:
-5(x+4)> 30
-5x-20>30
-5x>30+20
-5x>50
5x<-50 (multiplying -1 to -5x and 50)
x<-50/5
x< -10
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