SOLUTION: having trouble with these problems. 3(2-4x)+9(x-5)-10(3-2x)-7(X-3)=5 9(X+3)-3(X+4)-4(-3-X)<5 3(X-9)-4(2X+3)-3(-3-X)<5 7x+(-7)-3X+3-(-9)-4+2(3X-2)<6 3(4-5X)-4(3-5X)=10X-(-10X)-

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Question 329323: having trouble with these problems.
3(2-4x)+9(x-5)-10(3-2x)-7(X-3)=5
9(X+3)-3(X+4)-4(-3-X)<5
3(X-9)-4(2X+3)-3(-3-X)<5
7x+(-7)-3X+3-(-9)-4+2(3X-2)<6
3(4-5X)-4(3-5X)=10X-(-10X)-2(10X-1)>6
Answer by Edwin McCravy(20055)   (Show Source): You can put this solution on YOUR website!

3(2 - 4x) + 9(x - 5) - 10(3 - 2x) - 7(x - 3) = 5

      6 - 12x + 9x - 45 - 30 + 20x - 7x + 21 = 5

                                    10x - 48 = 5

                                         10x = 53

                                           x = 

------------------------------------------------------------

9(X + 3) - 3(X + 4) - 4(-3 - X) < 5

     9X + 27 - 3X - 12 + 12 +4X < 5

                       10X + 27 < 5

                            10X < -22

                              X < 

                              X < 

------------------------------------------------------------

3(X - 9) - 4(2X + 3) - 3(-3 - X) < 5

      3X - 27 - 8X - 12 + 9 + 3X < 5

                        -2X - 30 < 5

                             -2X < 35

                               X > 

Notice that the <  became a > because we divided by a negative number, -2.

                               X > 

----------------------------------------------- 

7x + (-7) - 3X + 3 -(-9) - 4 + 2(3X - 2) < 6

Do that one by yourself.  The answer is x < 

-----------------------------------------------
               | 
3(4-5X)-4(3-5X)=10X-(-10X)-2(10X-1)>6
               |  

You mistyped an equal sign in there where the bars "|"'s are:

If that = sign should have been a +, the answer is X > 

If that = sign should have been a -, the answer is X <     
(The last step is division by a negative so the > becomes a <  )

Edwin
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