EllaTheCat EllaTheCat

01-02-2017
Mathematics

contestada

Solve the equation.

|7x+4|=18

Respuesta :

01-02-2017

x equals twelve divided by seven

Answer Link

garydesir1 garydesir1

01-02-2017

Hi Ella

|7x + 4| = 18
Solve absolute value
We know either 7x + 4 = 18 or 7x + 4 = -18
There are 2 possibilities but we gonna solve it one after another
Lets start with possibility 1
7x + 4 = 18
7x = 18 - 4
7x = 14
x= 14/7
x= 2
Now, lets solve for possibility 2
7x + 4 = -18
7x = -18 - 4
7x = -22
x= -22/7

Final answers : X = 2 or x = -22/7

I hope that's help !

Answer Link

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