SOLUTION: please help me solve the following equations: [x-5]=15 3[x]-5=1 [x]+5=15 3[2x-5]-2=7

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Question 142095: please help me solve the following equations:
[x-5]=15
3[x]-5=1
[x]+5=15
3[2x-5]-2=7
Answer by nabla(475) About Me  (Show Source):
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[x-5]=15
x-5=15 or x-5=-15
gives x=20 or x=-10
3[x]-5=1
3|x|=6
|x|=2
gives x=2 or x=-2
[x]+5=15
|x|=10
gives x=10 or x=-10

3[2x-5]-2=7
3|2x-5|=9
|2x-5|=3
2x-5=3 or 2x-5=-3
2x=8 or 2x=2
gives x=4 or x=1