|3x-7| + 7 = 9 What is the first solution? Plzzz help
Mathematics · College · Tue Nov 03 2020
Answered on
Given the equation: |3x-7| + 7 = 9
Solve first the numbers that has | |, which means to absolute value. The absolute value of any number is equal to the number itself without the regards of its sign, meaning if the number is 3, its absolute value is 3, if the number is -7, it's absolute value is -7.
|3x-7| =3x+7
Now, the absolute value of 3x-7 which is 3x + 7 can be substituted in the equation.
3x+7+7=9
3x+14=9
3x=9-14
3x=-5
x= -5/3 or -1.6667