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-
How to use it?
- Inequation:
- 13*x^1<=0
- x+4>5*x
- (1/3)^(x/2)>9
- x-1/(x-3)*(x-2)<=0
- Graphing y =:
- 13-4*x
- Limit of the function:
-
21
- Sum of series:
-
21
-
Identical expressions
- thirteen - four *x> twenty-one
- 13 minus 4 multiply by x greater than 21
- thirteen minus four multiply by x greater than twenty minus one
- 13-4x>21
-
Similar expressions
- 13+4*x>21
- (1/9)^((2*x+2)*1/(x+4))*18^(2*x)*3*x^(-2)<=12^x*27^((-x-1)*1/(x+4))*1/(9*x^2)
- cosx>0,5(2^(1/2))
- (2^(1+2*x)-1)^(1/2)<2-2^x
- 13-4x>5-6x
- 22-x>13-4x
13-4*x>21 inequation
The solution
Detail solution
Given the inequality:
$$13 - 4 x > 21$$
To solve this inequality, we must first solve the corresponding equation:
$$13 - 4 x = 21$$
Solve:
Given the linear equation:
Move free summands (without x)
from left part to right part, we given:
$$- 4 x = 8$$
Divide both parts of the equation by -4
$$x_{1} = -2$$
$$x_{1} = -2$$
This roots
$$x_{1} = -2$$
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
$$x_{0} = x_{1} - \frac{1}{10}$$
=
$$-2 + - \frac{1}{10}$$
=
$$- \frac{21}{10}$$
substitute to the expression
$$13 - 4 x > 21$$
$$13 - \frac{\left(-21\right) 4}{10} > 21$$
the solution of our inequality is:
$$x < -2$$
$$13 - 4 x > 21$$
To solve this inequality, we must first solve the corresponding equation:
$$13 - 4 x = 21$$
Solve:
Given the linear equation:
13-4*x = 21
Move free summands (without x)
from left part to right part, we given:
$$- 4 x = 8$$
Divide both parts of the equation by -4
x = 8 / (-4)
$$x_{1} = -2$$
$$x_{1} = -2$$
This roots
$$x_{1} = -2$$
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
$$x_{0} = x_{1} - \frac{1}{10}$$
=
$$-2 + - \frac{1}{10}$$
=
$$- \frac{21}{10}$$
substitute to the expression
$$13 - 4 x > 21$$
$$13 - \frac{\left(-21\right) 4}{10} > 21$$
107/5 > 21
the solution of our inequality is:
$$x < -2$$
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Solving inequality on a graph