-20 > -2x + 4
-20 -4 > -2x
-24 > -2x
-24/-2 < x <inequality changes when you divide by a -ve no. >
12 < x
Explanation:
2x > 4 + 20
2x > 24
x > 12
or
x ∈ 《12 , + ∞》
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