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aleksandr82 [10.1K]
3 years ago
9

Solve 2x + 9 (x-1) = 8 (2x + 2) - 5

Mathematics
2 answers:
slamgirl [31]3 years ago
3 0

Answer:

x = -4

Step-by-step explanation:

2x + 9 (x-1) = 8(2x + 2) -5

2x + 9x - 9 = 16x + 16 - 5

11x - 9 = 16x +11

-9 = 5x +11

-20= 5x

x= -4

Len [333]3 years ago
3 0
X= - 4
I used Photomath to solve

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Answer:  9 1/3 - 2/3 =  8  2/3 .
___________________________________

Note:  If the answer were "8 1/3" ; 

then:  "8 1/3 + 2/3 =? 9 1/3 ? "  

      → "8 1/3 + 2/3 = 8  3/3 = 8 + 1 = 9 = only "9" ;
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So the answer has to be MORE than "8 1/3"

Try "8 2/3"  → "8 2/3 + 2/3 =? 9 1/3?" ?? ; 
        
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 So, the answer is:  "8  2/3" .
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Another method:
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Given the problem:  "<span>9 1/3 - 2/3 " ;
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Note that:  "2/3 = 1/3 + 1/3"
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So, "</span><span>9 1/3 - 2/3 = 9 1/3 - (1/3 + 1/3) = 9 1/3 - 1/3 - 1/3 = ?
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   Start with:  "</span>9 1/3 - 2/3" = 9.  Then 9 - 1/3 = 8 3/3 - 1/3 = 8 2/3.
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</span>Another method:
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Given the problem:  
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  "9 1/3 - 2/3 = ?? " ;
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  Convert "9 1/3" into "28/3" ;  ("3*9 = 27"); ("27+1=28");
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  So, we rewrite as:  
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