SOLUTION: In the solution of the equation 5 - 3x = 2x + 9, 3x is added to the equation first. Which of the following should be done next?

Algebra ->  Linear-equations -> SOLUTION: In the solution of the equation 5 - 3x = 2x + 9, 3x is added to the equation first. Which of the following should be done next?       Log On


   

Question 1023916: In the solution of the equation 5 - 3x = 2x + 9, 3x is added to the equation first. Which of the following should be done next?

Found 2 solutions by ewatrrr, MathLover1:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi  

5 - 3x = 2x + 9   

I. 3x is added to both sides of the EQ 

5 = 5x + 9  

II. NEXT Add -9 to both sides of the EQ ****

-4 = 5x

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
5+-+3x+=+2x+%2B+9, if 3x is added to the both sides of the equation, we have
5+-+3x+%2B3x=+2x+%2B3x%2B+9........simplify
5+-+cross%283x%29+%2Bcross%283x%29=+5x%2B+9
5+=+5x%2B+9 if -9 is added to the both sides of the equation, we have
5-9+=+5x%2B+9-9........simplify
-4+=+5x%2B+cross%289%29-cross%289%29
-4+=+5x....... both sides of the equation divide by 5
-4%2F5+=+5x%2F5
-4%2F5+=+cross%285%29x%2Fcross%285%29
-4%2F5+=+x