Mathematics

Question

Solve the equation.

|7x+4|=18

2 Answer

  • x equals twelve divided by seven
  • 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 ! 


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