Mister Exam

3x<-3 inequation

A inequation with variable

The solution

You have entered [src]
3*x < -3
$$3 x < -3$$
3*x < -3
Detail solution
Given the inequality:
$$3 x < -3$$
To solve this inequality, we must first solve the corresponding equation:
$$3 x = -3$$
Solve:
Given the linear equation:
3*x = -3

Divide both parts of the equation by 3
x = -3 / (3)

$$x_{1} = -1$$
$$x_{1} = -1$$
This roots
$$x_{1} = -1$$
is the points with change the sign of the inequality expression.
First define with the sign to the leftmost point:
$$x_{0} < x_{1}$$
For example, let's take the point
$$x_{0} = x_{1} - \frac{1}{10}$$
=
$$-1 + - \frac{1}{10}$$
=
$$- \frac{11}{10}$$
substitute to the expression
$$3 x < -3$$
$$\frac{\left(-11\right) 3}{10} < -3$$
-33      
---- < -3
 10      

the solution of our inequality is:
$$x < -1$$
 _____          
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       x1
Solving inequality on a graph
Rapid solution [src]
And(-oo < x, x < -1)
$$-\infty < x \wedge x < -1$$
(-oo < x)∧(x < -1)
Rapid solution 2 [src]
(-oo, -1)
$$x\ in\ \left(-\infty, -1\right)$$
x in Interval.open(-oo, -1)