Example

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

Question

$$x2+21x+90 > 0$$

Solve for x

$x>-\frac{x_{2}}{21}-\frac{30}{7}$

Solve for x_2

$x_{2}>-21x-90$

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