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Roman55 [17]
2 years ago
14

X2 + 14x + 7 = 9x + 3 x = or x =

Mathematics
1 answer:
Vinvika [58]2 years ago
5 0

Answer:

x= -1  or  x= -4

Step-by-step explanation:

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ty rode his trail bike for 4.5 hours. his average speed was 12 miles per hour. how many miles did he ride?
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Hey there!


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If DF = 9x-39, find EF.
otez555 [7]

DF=DE+EF\\\\DF=9x-39\\DE=47\\EF=3x+10\\\\\text{substitute}\\\\9x-39=47+3x+10\\9x-39=3x+57\ \ \ |-3x\\6x-39=57\ \ \ \ |+39\\6x=96\ \ \ \ |:6\\x=16\\\\\text{put the value of x to the expression}\ 3x+10\\\\EF=3(16)+10=48+10=58

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7 0
2 years ago
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