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28.01.2020 •
Mathematics
1.what is value of x?
enter your answer in the box. pic 1
2. what is the value of x?
enter your answer, as a decimal, in the box. do not round your answer.
x=
pic 2
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Ответ:
|AB| |BD|
=
|AC| |DC|
x+8 10
=
2x-5 14
10(2x-5)=14(x+8)
20x-50 = 14x+112
20x-14x = 112+50
6x = 162
x= 162/6
x=27
For the second picture
AD| |AC|
=
|DB| |CB|
3 4
--=---
x 7.5
4×X = 3×7.5
x = 22.5/4
x = 5.625
Ответ: