Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$| 2 x + 1 | \geq 3$$

Solve for x

$x\in (-\infty,-2]\cup [1,\infty)$

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