Given the inequality:
−5x≤−10To solve this inequality, we must first solve the corresponding equation:
−5x=−10Solve:
Given the linear equation:
-5*x = -10
Divide both parts of the equation by -5
x = -10 / (-5)
x1=2x1=2This roots
x1=2is the points with change the sign of the inequality expression.
First define with the sign to the leftmost point:
x0≤x1For example, let's take the point
x0=x1−101=
−101+2=
1019substitute to the expression
−5x≤−10−105⋅19≤−10-19/2 <= -10
but
-19/2 >= -10
Then
x≤2no execute
the solution of our inequality is:
x≥2 _____
/
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x1