3. Sophie solved the inequality
as shown. Explain Sophie's error
and give the correct solution to
the inequality.
-5(x - 1) > -7x + 19
-5X - 5 >-7x +19
2x - 5 > 19
2x > 24
X>12

Respuesta :

Answer:

After she distribute the [tex]x[/tex] and [tex]-1[/tex] by [tex]-5[/tex], the after you get [tex]-5x - 5 > -7x + 19[/tex], she put a negative [tex]5[/tex] instead of a positive [tex]5[/tex], and would be written as[tex]-5x + 5 > -7x + 19[/tex].

Step-by-step explanation:

Solve the inequality for the correct solution:

[tex]-5(x - 1) > -7x + 19[/tex]

-Use Distributive Property:

[tex]-5(x - 1) > -7x + 19[/tex]

[tex]-5x + 5 > -7x + 19[/tex]

-Take [tex]7x[/tex] and add it to [tex]-5x[/tex]:

[tex]-5x + 5 + 7x > -7x + 7x + 19[/tex]

[tex]2x + 5 > 19[/tex]

-Subtract [tex]5[/tex] to both sides:

[tex]2x + 5 - 5 > 19 - 5[/tex]

[tex]2x > 14[/tex]

-Divide both sides by [tex]2[/tex]:

[tex]\frac{2x}{2} > \frac{14}{2}[/tex]

[tex]\boxed {x > 7}[/tex]