PLEASE HELP 15 POINTS!!

Mathematics

1 answer:

tigry1 [53]3 years ago

3 0

28. 6x+42-20=6x
42-20=0
42-20 gives you 22
22=0
Statement is false

30. -2x-4=-2x-3-1
-2x-4=-2x-4
Statement is true because both sides are identical

32. 2x+8-5=2x+3
8-5=3
3=3
Statement is true for any value of x

34. 3x+(x+4)=18
3x+x+4=18
4x+4=18
4x=18-4
4x=14 (next divide both sides by 4)
x= 7 over 2
7/2

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Step-by-step explanation:

Let's look at the first two, and hopefully you'll be able to figure the rest out:

1. Answer below

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