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lina2011 [118]
3 years ago
14

Help again!!! answer this

Mathematics
2 answers:
nikklg [1K]3 years ago
8 0
The answer is 7.
x + 8 + 2x - 5 = 10 + 14
x + 8 + 2x - 5 = 24
                + 5 = +5
 x +8 + 2x = 29
     -8             -8
x + 2x = 21
put the x's together
3x = 21
divide
x= 7
 

check 3 x 7 = 21
Arte-miy333 [17]3 years ago
6 0
Same rule as the last problem I solved:
\frac{x + 8}{10}  =  \frac{2x - 5}{14}  \:  \: ... \: cross - multiply \\ 14(x + 8) = 10(2x - 5) \\ 14x + 112 = 20x - 50 \\  - 6x =  - 162
- 6x =  - 162 \\   \frac{ - 6x}{ - 6}  =   \frac{- 162}{ - 6}  \\ x = 27

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