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justify each step 24-X=-16 and -8=2X-5 and X/7+4=15

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2 Answers

#1:

24  -  x  =  -16

-24            -24

-x  =  -30

-1       -1

x  =  30

#2:

-8  =  2x  -  5

+5           +5

-3  =  2x

2        2

-3/2  =  x

#3:

(x/7)  +  4  =  15

           - 4      - 4

(x/7)  =  11

7 ·   x  =  11  ·  7

      7 

x  =  77

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