SOLUTION: Pre-Algebra Chapter 3 Resource Book Lesson 3.3 Practice B (Don't know if this will help) Tell whether the given value of the variable is a solution of the equation. question

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Question 102375: Pre-Algebra Chapter 3 Resource Book Lesson 3.3 Practice B (Don't know if this will help)
Tell whether the given value of the variable is a solution of the equation.
question 2:
4x + 13 = -9 -3(x+9); x = -7
4(-7) + 13 = -9 -3 (-7 + 9)
-28 + 13 = -9 + 21 -27
12 = -15

x does not equal -7
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
You did everything right up until this step

12=15


Let's go back to the previous step

-28+%2B+13+=+-9+%2B+21+-27


Now add -28 and 13 to get -15 (not 12)

-15+=+-9+%2B+21+-27


Now add -9, 21, and -27 to get -15

-15+=+-15


So this means x=-7 is a solution