Question

2x>10 f) 3x <21 g)×>5 k) 2×+12 <30

Answer 1

2x > 10
x > 10/2
x > 5            S = { x ∈ R | x > 5 }
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3x < 21
 x < 21/3
 x < 7          S = { x ∈ R | x < 7 }
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x > 5           S = { x ∈ | x > 5 }
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2x + 12 < 30
2x < 30 - 12
2x < 18
 x < 18/2
 x < 9             S= { x < 9 }