Mister Exam

-5t<15 inequation

A inequation with variable

The solution

You have entered [src]
-5*t < 15
$$- 5 t < 15$$
-5*t < 15
Detail solution
Given the inequality:
$$- 5 t < 15$$
To solve this inequality, we must first solve the corresponding equation:
$$- 5 t = 15$$
Solve:
Given the linear equation:
-5*t = 15

Divide both parts of the equation by -5
t = 15 / (-5)

$$t_{1} = -3$$
$$t_{1} = -3$$
This roots
$$t_{1} = -3$$
is the points with change the sign of the inequality expression.
First define with the sign to the leftmost point:
$$t_{0} < t_{1}$$
For example, let's take the point
$$t_{0} = t_{1} - \frac{1}{10}$$
=
$$-3 + - \frac{1}{10}$$
=
$$- \frac{31}{10}$$
substitute to the expression
$$- 5 t < 15$$
$$- \frac{\left(-31\right) 5}{10} < 15$$
31/2 < 15

but
31/2 > 15

Then
$$t < -3$$
no execute
the solution of our inequality is:
$$t > -3$$
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       t1
Solving inequality on a graph
Rapid solution 2 [src]
(-3, oo)
$$t\ in\ \left(-3, \infty\right)$$
t in Interval.open(-3, oo)
Rapid solution [src]
And(-3 < t, t < oo)
$$-3 < t \wedge t < \infty$$
(-3 < t)∧(t < oo)