Question 329323
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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 = {{{53/10}}}

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

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

                       10X + 27 < 5

                            10X < -22

                              X < {{{(-22)/10}}}

                              X < {{{-11/5}}}

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

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

                        -2X - 30 < 5

                             -2X < 35

                               X > {{{35/(-2)}}}

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

                               X > {{{-35/2}}}

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

Do that one by yourself.  The answer is x < {{{9/10}}}

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               | 
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 > {{{4/5}}}

If that = sign should have been a -, the answer is X < {{{-4/15}}}    
(The last step is division by a negative so the > becomes a <  )

Edwin</pre>