Question

Дано:
BC=3x+2
DE=6
BD=5x-1
CE=x+7
Найти:
CD=?

Answer 1

CE=x+7=CD+DE=CD+6; значит СD=CE-6=x+7-6=x+1

BD=5x-1=BC+CD=3x+2+x+1

5x-1=4x+3; x=4

СD=x+1=4+1=5