evaaaamath
evaaaamath evaaaamath
  • 04-09-2017
  • Mathematics
contestada

Find the length of DB with the length indicated

Find the length of DB with the length indicated class=

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kphung76127
kphung76127 kphung76127
  • 04-09-2017
DB should equal CB plus DC.

First write an expression to represent DC.
(x+168)-(3x+134)
x+168-3x-134
-2x+34

Then write an equal for DC plus CB equals DB
-2x+34+71= 153+2x
-2x+105= 153+2x
-4x+105=153
-4x=48
x= -12

Now plug in the value of x to find DB
153+2(-12)
153-24
129

Final answer: 129
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